Answer:
During the World War II, in the United States, (c.) unemployment declined, production soared, and income taxes increased
Step-by-step explanation:
The World War II in the United States brought about various changes positively for the economy of the country and its citizens. As result of the need for more hands during the war, millions of young people were recruited into the war while millions of several categories of people ranging from housewives, students, retired citizens entered the labor force lured by high level of patriotism and increased wages.
The economy boomed during the period under President Franklin D. Roosevelt as various unions and associations supported his policies that brought America to become a more formidable country during and after the World War II.