The answer is: A) Alternating periods of expanding and contracting economic activity, which are usually illustrated using movements in real GDP.
Explanation:
The stages of a business cycle (also known as economic cycle) are:
expansion: increase in the production and prices, economic growth peak: economic growth hits its maximum ratecontraction: economic growth slows down and falls (recession), unemployment rises and prices stagnatetrough: the economy hit its lowest point and starts to grow back again through a new expansion stagefor what purpose meeting is conducted