When the Required Reserve Ratio Is Decreased

When the required reserve ratio is decreased:

A) ​the excess reserves of member banks are reduced, but the money multiplier is not affected.
B) ​the excess reserves of member banks are reduced, and the money multiplier is increased.
C) ​the excess reserves of member banks are increased, but the money multiplier is not affected.
D) ​the excess reserves of member banks are increased, and the money multiplier is increased.