It was the turning point where the German troops failed defeat the Soviet Union
I believe the answer is: A.a higher degree of government regulation of business and the economy.
After the new deal reform, several jobs and projects was created by the Government in order to reduce the amount of unemployment after the Economic depression. In order to fund the projects, the government make an adjustment to increase tax payment rate that must be paid by the people.
Radiation its visible light that we see during the day.