This seems more like an opinionated question, and less of one that has a real answer. However, I would choose B because it would make a follow up question easier, and it seems like it’s more of what the teacher would be looking for.
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It is the evening of August 6. After 12 hours of post-bomb suffering, a Japanese naval launch moves slowly down the seven rivers of Hiroshima, stopping at strategic spots. A young naval officer in a neat uniform announces that there is hope and that the people should be patient because help — a naval hospital ship — is coming. The survivors breathe easier knowing help is on the way.