Step 1: The paragraph should describe an encounter with a young American and his perspective, forming a personal narrative. We need to identify the sentence that disrupts this coherence.
Step 2: Sentence C introduces the encounter: a young American visiting to discuss a book, setting the scene.
Step 3: Sentence D provides background about the American, identifying him as the son of an alcoholic vagrant, adding context to his identity.
Step 4: Sentence B shares what he said: his generation believes it has no future, giving insight into his perspective.
Step 5: Sentence A concludes with the narrator’s reaction, noting familiarity with such sentiments, wrapping up the interaction.
Step 6: Sentence E, which broadly discusses alcohol’s impact on the family, is too general and shifts focus from the specific encounter to a wider issue, disrupting the narrative flow of C-D-B-A.
Verification: The sequence C-D-B-A forms a coherent paragraph: encounter (C), background (D), his statement (B), narrator’s reaction (A). E introduces an unrelated theme about alcohol’s impact.