详解
Choice B is the best answer. The passage centers on a night when a young man tries to get approval to marry a woman's daughter. The passage includes detailed descriptions of setting (a "winter's eve" and a "cold rain," lines 5-6("He... veranda")); character (Akira's "soft, refined" voice, line 33("His ... refined"); Akira's eyes "sh[ining] with sincerity," line 35("In... sincerity")); and plot ("Naomi was silent. She stood a full half minute looking straight into Chie's eyes. Finally, she spoke," lines 88-89("Naomi... spoke")).
Choice A is incorrect because the passage focuses on a nontraditional marriage proposal. Choice C is incorrect because the passage concludes without resolution to the question of whether Akira and Naomi will receive permission to marry. Choice D is incorrect because the passage repeatedly makes clear that for Chie, her encounter with Akira is momentous and unsettling, as when Akira acknowledges in line 73("I've... apologies") that he has "startled" her.