The answer is D. you can see the drop in the graph
A commercially successful steamboat :)
Within the next 2 to 4 months, the effects of the atomic
bombings in Nagasaki and Hiroshima have killed 39,000 to 80,000 people in
Nagasaki, and 90,000 to 146,000 people in Hiroshima. On the first day of the
bombing, almost half of the deaths in every city have occurred.
