What actions did President Roosevelt take to mobilize for a war economy and to gain the support of business? How did the automobile industry react? (Site 1)

17 million more jobs were created during the war.

Explanation:

this is just a bit of information you can use, i haven't studied this topic in a while, hope this helps!

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.