One of the Reasons Why the AD Curve Slopes Downward

Multiple Choice

One of the reasons why the AD curve slopes downward is that as the

A) price level rises,purchasing power rises.
B) price level falls,purchasing power rises.
C) nation's income level rises,purchasing power rises.
D) nation's income level rises,purchasing power falls.
E) This is a trick question,because the AD curve is upward sloping.