The correct answers are A) stagnating economy and C) massive federal debt.
The two things that helped cause a major recession in America during the early 1970s were a stagnating economy and massive federal debt.
These factors were important causes of the United States recession that started in 1972 and ended until the beginning of the next decade. The US stock market was very volatile, the economy of the country was weak and the unemployment rates were high. Inflation was also high and the central bank decided to raise the interest rates, affecting most of the industries in America.