One Reason That Economists Are Interested in Gross Flows in the Labour

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

A) gives a better estimate of NAIRU.
B) gives a good estimate of the incidence of unemployment.
C) excludes only the new entrants and retirements of people moving into and out of the labour force.
D) in relation to the stock of unemployment can indicate the amount of time the average person spends unemployed.
E) provides a better indication of the total number of people unemployed at any one time.