Answer:
B) Millions of Americans joined the U.S. military
Explanation:
One of the reasons why the unemployment rate dramatically decreased during these years was because millions of Americans joined the U.S. military. This is because during these years, World War II was taking place. Although the United States had remained neutral during the first few years of the war, it decided to get involved after the Japanese attack on Pearl Harbor.
Answer: B) Cleaner-burning gas had to be used in cars.
Explanation:
I think the first one is "paper assets" and the second one "derivates". I'm not 100% sure though.