Choice D is the best answer. In lines 65-68("being...To") of Passage 2, Grimké writes, "Now if rights are founded in the nature of our moral being, then the mere circumstance of sex does not give to man higher rights and responsibilities, than to woman." In other words, gender does not make men's rights and duties superior to women's. Beecher, on the other hand, begins Passage 1 by stating that "heaven has appointed to one sex the superior, and to the other the subordinate station," suggesting that men and women have fundamentally different natures. Therefore, Beecher most likely would have disagreed with Grimké's assertion.
Choices A and B are incorrect because Beecher fundamentally disagrees with Grimké regarding the basic nature and societal roles of men and women, making it very unlikely that she would have viewed Grimké's statement in lines 65-68("being...To"), with either sympathy or agreement. Choice C is incorrect because Beecher wouldn't necessarily have been dismayed by Grimké's belief as much as she would have simply disagreed with it, and she does not indicate that the role of women in society is more difficult to play than is that of men.