The fluctuating levels of economic activity in an economy over a period of time measured from the beginning of

one recession to the beginning of the next is known as a(n)
a. economic recovery
b. expansion
c. contraction
d. business cycle

d. business cycle

The correct answer is d. business cycle. The business cycle refers to the fluctuating levels of economic activity in an economy over a period of time, typically measured from the beginning of one recession to the beginning of the next. It includes stages such as expansion, contraction, recession, and recovery.