Thanks for your question!
On the RC questions that ask about what can be "reasonably inferred" from the passage, you won't have to actually make much of an inferential jump. You should look instead for a line in the passage that directly supports an answer choice.
Here, we are given a number of reasons why members of the upper class were more likely to publish memoirs than members of the lower class (only half of French citizens at this time could read, and only the upper class could write easily). It's fair to extend these facts about the French population as a whole -- that primarily only upper-class French citizens could publish memoirs -- to a subset of the French population (male memoir writers). It's really not much of an inferential jump to reach answer choice (D) based on these facts.
For answer choice (A), we have conflicting data points about whether the women's memoirs depicted women in socially prescribed roles. On one hand, we have one scholar's statement that "women memoirists of this period defined themselves in relationship to their sex -- conforming to socially prescribed feminine roles." However, we also have examples in lines 40-55 of women who defied socially prescribed roles and instead took on traditionally masculine roles (acting as defense attorneys, soldiers, and political activists).
Since we have conflicting information how women are depicted in women's memoirs, it's not a safe bet to assume that the memoirs written by men would depict women in traditional roles. Although there is some information that could support this inferential leap, it's a bigger jump in reasoning than you should be making in a RC question.
I hope this clears things up.