The first to say about his passage that in my humble opinion it is BAD
You can barely infer the first question, particularly I, and you have to stretch your mental muscle quite a lot
Look at this phrase
Our “frailties”—instincts such as rage, fear, greed, gluttony, joy, lust, and love—may be a very mixed assortment,
mixed assortment does not necessarily mean the I assumption
I. Evolution does not favor the emergence of adaptive frailties over the emergence of maladaptive frailties
maybe our maladaptive are in the ratio 1/90 good /bad but reading the I my feeling is they are 50/50 or 49/51 or around that. Because the passage says: very mixed.
However , assuming that, I and II are correct but the II is too extreme.
D is the answer
better to move on from these passages