Paraphrase:
Some modern anthropologists say biological evolution has shaped both morphology and human behavior. According to them evolution controls human behavior by restricting, not by dictating, human behavior. Restriction is done by controlling ways of feeling, thinking and acting - these are typical to any culture. Our(Human) weaknesses (emotions and motives such as rage, fear etc) may be unique in their own way, but still they share a common character. i.e Humans are controlled by these weakness(frailties).
Unfortunately, some of these weaknesses (frailties) are presently out of order (maladaptive = wrongly configured). These weaknesses may seem to be determined by culture,but biology(evolution) plays a great role as well. We have to completely understand how these weaknesses originated, then only we can understand how they restrict us. And if we understand how they restrict us, we might get out of their restriction.
1. The primary purpose of the passage is to presentA. a position on the foundations of human behavior and on what those foundations imply
Correct: The passage first says what position the anthropologists hold(evolution-human behaviour relationship), then say what we get of this position(we can get out of maladaptive behavior)
B. a theory outlining the parallel development of human morphology and of human behavior
Incorrect: The passage just mentions evolution shapes both morphology and human behavior. It never draws parallel. All the description is about human behaviour only.
C. a diagnostic test for separating biologically determined behavior patterns from culture-specific detail
Incorrect: No test is mentioned. The passage just says, behavior patterns are influenced by both culture(superficially) and biologically(may be actually). But never tries to separate them.
D. a practical method for resisting the pressures of biologically determined drives
Incorrect: No method is suggested. The second paragraph just mention, if we understand origin of biologically determined drives, we may someday control it. It is a theoretical possibility or unproven hypothesis, not a certain practical method.
E. an overview of those human emotions and motives that impose constraints on human behavior
Incorrect: Human emotions and motives do not impose constraints on human behavior. But evolution does. No overview is provided about emotions and motives, they are just mentioned. Paragraph is all about how evolution shapes human behavior and emotions and motives just come within the scope.
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