Both Japan in the 1990s and the U

Both Japan in the 1990s and the U.S.during the Great Depression followed a restrictive monetary policy,because

A) all the leading indicators,such as the money supply and price levels,suggested that this policy was effective.
B) most economists believed the restrictive monetary policy was the correct response to a recession.
C) when an expansionary monetary policy was briefly followed,both employment and GDP declined.
D) key policy-makers thought low interest rates indicated that monetary policy was highly expansionary.