During the 1980s, the Top Marginal Tax Rate on Personal

During the 1980s, the top marginal tax rate on personal income was reduced from 70 percent to less than 40 percent and it has remained below 40 percent since that time.  In recent years, the share of the personal income tax collected from the top one-half of one percent of earners has

A) fallen sharply from the level of  years prior to 1981.
B) increased sharply during the Clinton administration, but declined substantially during the administration of George W. Bush.
C) been virtually unchanged from the level of years prior to 1981.
D) increased substantially from the level of years prior to 1981.