If Fed a Cares Only About Keeping the Price Level

Multiple Choice

If Fed A cares only about keeping the price level stable and Fed B cares only about keeping output at its natural level, then in response to an exogenous decrease in the velocity of money:

A) both Fed A and Fed B should increase the quantity of money.
B) Fed A should increase the quantity of money whereas Fed B should keep it stable.
C) Fed A should keep the quantity of money stable whereas Fed B should increase it.
D) both Fed A and Fed B should keep the quantity of money stable.