Blank (i)

The first clause asserts that scholarly biographies of controversial political figures are "as a rule, vitiated by a pronounced _______ that colors their historical judgments." The verb "vitiated" means spoiled, corrupted, or impaired the quality of. The relative clause "that colors their historical judgments" is the defining clue: it describes a distorting influence that prevents fair, neutral assessment. Blank (i) must therefore be a noun meaning prejudice, partiality, or predisposition that undermines objectivity.
- A. merit - A praiseworthy quality, a strength. If biographies were "vitiated by a pronounced merit," the sentence would be internally contradictory: a merit does not corrupt or spoil; it enhances. Moreover, a merit would not "color judgments" in the negative sense implied by the context. Incorrect.
- B. bias - A systematic inclination or prejudice that prevents impartial judgment. "Vitiated by a pronounced bias that colors their historical judgments" is stylistically precise and logically tight: bias is exactly what distorts historical assessment by predisposing the author toward one side. The word directly anticipates the contrast with Blank (ii), where the new book's virtue is its refusal to take sides. Correct.
- C. conundrum - A confusing or intractable problem; a puzzle. This is a sophisticated distractor. A reader might reason: "These biographies have a problem, so 'conundrum' fits." But "conundrum" describes a situation that perplexes or confounds - it does not describe a corrupting force that "vitiates" or an internal predisposition that "colors judgments." A biographer may face a conundrum, but the conundrum itself does not vitiate the work; bias does. The distinction is between an external puzzle and an internal failing. Incorrect.

Blank (ii)

The semicolon introduces a contrast, reinforced by the phrase "by gratifying contrast." The new account is "distinguished throughout by a rigorous _______ that refuses to advocate either for prosecution or for defense." The relative clause "that refuses to advocate..." is the defining clue: it describes a stance of strict neutrality, refusing to act as either prosecutor or defender of the statesman. Blank (ii) must therefore be a positive noun meaning impartiality, neutrality, or freedom from bias.
- D. equivocation - The use of ambiguous or evasive language to avoid committing to a position; hedging. This is the most dangerous distractor in the item. Superficially, "refusing to advocate either for prosecution or for defense" might sound like equivocation - avoiding taking a side. But "equivocation" carries a strongly pejorative charge: it implies deception, evasiveness, or a deliberate failure to be forthright. The sentence, however, unequivocally praises the new book ("gratifying contrast," "distinguished," "rigorous"). The required word must be a virtue, not a vice. The book does not evade judgment through ambiguity; it suspends advocacy through principled neutrality. The distinction is between evasion and impartiality. Incorrect.
- E. dispassion - Freedom from bias or emotional involvement; impartiality, objectivity. "Rigorous dispassion" captures exactly the virtue of a historian who refuses to be swayed by partisan considerations - who will neither prosecute nor defend but simply present the evidence. It is the precise antonym of "bias" in Blank (i), creating a tight conceptual symmetry: the genre is marred by bias; this book is distinguished by dispassion. Correct.
- F. eloquence - Fluent, graceful, and persuasive expression. While eloquence is undoubtedly a positive quality in a biography, it does not contrast with the flaw identified in Blank (i). The logical structure demands a virtue that specifically opposes "bias that colors judgments" - and that virtue is impartiality, not stylish prose. A book can be eloquent yet deeply biased; eloquence is orthogonal to the axis of objectivity that structures the sentence. Incorrect.