The rise and fall of economic activity through periods of expansion and recession is known as the a. business cycle b. percentage change c. unemployment rate d. consumer price index

(A) business cycle

Explanation:

In economic theory, the process of expansion and retraction of economic activity is theoretically explained by the concept of economic cycle. According to the theory of economic cycles, it is natural for capitalism itself that the heated economy generate euphoria and expectations that are adjusted through recessive crises. After the crisis, the economy recovers gradually, restarting the economic cycle that will materialize when a new recession occurs.

racism and segregation.

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the war.