The Historical Data on Velocity Shows That Velocity for

The historical data on velocity shows that velocity for

A) M₁ has fallen since 1929 and has become more stable since 1981.
B) M₁ has risen since 1949 and has become more volatile since 1981.
C) both M₁ and M₂ have increased since 1949 but have become more stable since 1979.
D) both M₁ and M₂ have declined since 1949.