单选题
Which of the following is the least possible reason for the launching of the Manhattan Project?
A、
Franklin D. Roosevelt.
B、
Nazi Germany.
C、
Albert Einstein and other scientists.
D、
The Second World War.
【正确答案】
A
【答案解析】
[题解] 根据提问，罗斯福是决策者，其他几个选项或多或少是促成曼哈顿计划的原因。It was shortly thereafter that the United States Government began the serious undertaking．
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