To Identify the Onset of a Recession, the National Bureau

To identify the onset of a recession, the National Bureau of Economic Research (NBER) Business Cycle Dating Committee:

A) uses data on nominal GDP for two consecutive quarters.
B) uses a range of indicators including real GDP, employment and income.
C) identifies declining economic activity solely based on a fall in real GDP.
D) uses a procedure that determines the dates of peaks and troughs mainly on the basis of employment.