Over the Past 50 Years,the U.S.money Supply Has

Over the past 50 years,the U.S.money supply has

A) increased every year, despite federal efforts to hold it in check.
B) increased in some years but has tended to shrink overall.
C) generally increased, although not at a constant rate.
D) not changed; although the amount of money in circulation has varied, the actual money supply has not grown or shrunk.
E) fallen.