Choice B is the best answer. In the passage, a young man (Akira) asks a mother (Chie) for permission to marry her daughter (Naomi). The request was certainly surprising to the mother, as can be seen from line 47, which states that prior to Akira’s question Chie “had no idea” the request was coming.
Choice A is incorrect because the passage depicts two characters engaged in a civil conversation, with Chie being impressed with Akira’s “sincerity” and finding herself “starting to like him.”
Choice C is incorrect because the passage is focused on the idea of Akira’s and Naomi’s present lives and possible futures.
Choice D is incorrect because the interactions between Chie and Akira are polite, not critical; for example, Chie views Akira with “amusement,” not animosity.