Consecutive periods of deflation are also known as

a. economic fluctuations b. depressions c. economic growth d. recessions

The correct answer is D.

Deflation is a decrease in the general price level of goods and services. It occurs when the inflation level falls below 0%. Deflation is seen as a problem in economics because it increases the real value of debt which in turn aggravates and provokes recession.

Recession is a  general slow down in economic activity. Its main reasons are prolonged periods of deflation, a financial crisis or an adverse supply shock. Inflation falls during recession which is usually preceded by long and  consecutive periods of deflation.

d) he bring down boss tweed and tammany hall.

it increased the power of the king of england.