Structural Analysis & Logic Breakdown

Identifying the Structural Clues

The "So... that..." Construction: The sentence employs the classic correlative structure "So [adjective] has [subject] been... that [consequence]", where the extent of the quality in the blank causes the result described after "that".
The Cause-and-Effect Relationship: The consequence after "that" is "few recall how harshly her early buildings were criticized". For people to completely forget past harsh criticisms across multiple fields (design, urban planning, furniture, fashion), her current impact must be exceptionally strong, deep, and widely felt.

Evaluating the Options

A. tentative (uncertain, hesitant, provisional): Suggests weak or unconfirmed influence, which would not outweigh widespread memory of early criticism.
B. trifling (unimportant, trivial): Means negligible; contradicts the wide reach across multiple fields.
C. profound (very great, intense, far-reaching): Fits perfectly. A deep and far-reaching influence explains why early criticisms have been forgotten.
D. pronounced (very noticeable, strong, marked): Fits perfectly. A clear and strong influence similarly explains why the past negative reception is overshadowed.
E. inconsequential (not important or significant): Synonym for trifling; opposite of the required meaning.
F. decorative (serving an ornamental purpose): Too narrow and irrelevant to her influence on discipline-wide sectors like urban planning.

Verifying Sentence Equivalence (Pairing \& Meaning)

Both profound and pronounced indicate that the architect's impact was immense and undeniable, creating identical, logically sound sentences that explain why past criticisms faded into obscurity.