One Reason That Economists Are Interested in the Gross Flows

One reason that economists are interested in the gross flows in the labour market as well as the stocks of unemployed is that examining the flows

A) provides a good estimate of the overall level of employment.
B) provides the only reliable way to measure cyclical unemployment.
C) gives us a better estimate of NAIRU.
D) provides a better indication of the total number of people unemployed at any one time rather than just looking at the stocks.
E) gives more insight into the amount of labour- market turnover.