Final answer:
During World War II, big businesses like Boeing and Lockheed Martin received the most defense contracts, engaging in lobbying and converting to wartime production.
Explanation:
Big business is the best way to describe the companies that received the most defense contracts during World War II, such as Boeing and Lockheed Martin. These companies engaged in lobbying to secure contracts and played a crucial role in wartime production. The federal government's increased spending on defense led to lucrative deals for US businesses, driving them to convert to wartime production.
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