Answer Happy

Which of the following statements about US monetary policy
is​ true?
A.
Changes in the federal funds rate affect aggregate​ demand,
so the central bank can easily achieve a desired level of aggregate
demand
B.
Changes in the federal funds rate affect aggregate​ supply,
so the central bank can easily achieve a desired level of aggregate
supply
C.
Changes in the federal funds rate affect aggregate​ supply,
however in practice data limitations and implementation lags make
it difficult for the central bank to achieve desired level of
aggregate supply precisely
D.
Changes in the federal funds rate affect aggregate​ demand,
however in practice data limitations and implementation lags make
it difficult for the central bank to achieve desired level of
aggregate demand precisely