Choice D is the best answer. In the sixth paragraph, Stanton differentiates between men and masculine traits. Stanton argues that masculine traits or "characteristics," such as a "love of acquisition and conquest," serve to "subjugate one man to another" (lines 69-80,"selfish...in"). Stanton is suggesting that some masculine traits position men within certain power structures.
Choices A and B are incorrect because the sixth paragraph does not primarily establish a contrast between men and women or between the spiritual and material worlds. Choice C is incorrect because although Stanton argues that not "all men are hard, selfish, and brutal," she does not discuss what constitutes a "good" man.