C.<span>She joined the army disguised as a man.
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Answer: D.
Explanation: The U.S. sends people to discuss environmental issues with China.
Answer: Politicians, businessmen, and scientists.
Explanation:
The National Defense Advisory Commission (NDAC) was established in 1940 as part of the plan for applying science to the war effort.
The NDAC included seven experts in distinct fields of the economy, such as politicians, businessmen, and scientists. They were commanded to recommend defense materials required and the best way to obtain them. The commission was suspended on October 1941.
