Answer:
The correct answer is letter "A": an economic downturn that persists for more than two consecutive quarters of the year.
Explanation:
Recessions are economic downturns in an economy characterized by the fall growth for more than two consecutive quarters. The most important indicator that determines the economic downturn is the real Gross Domestic Product (GDP). The National Bureau of Economic Research (NBER) is the entity in charge of calling the recession.