As a result of economic growth during the 1950s, the percentage of americans who were in the middle class increased slightly. increased greatly. decreased slightly. decreased greatly.

increased greatly.

Explanation:

The 1950s were a period of economic expansion, also known as the golden age of capitalism. During this period, the US government adopted economic policies to expand fiscal spending, accompanied by low interest rates and debt relief. This was a period of economic prosperity, with lower rates of unemployment, higher incomes and welfare. Consequently, a large part of the American population ascended to the middle class.

i think its provide for the common defense

a)the court decides which cases it will hear