The LM curve slopes upward because a. as income rises, savings rise,

The LM curve slopes upward because

a. as income rises, savings rise, increasing output.
b. as interest rates rise, the money supply rises, increasing output.
c. as interest rates rise, planned investment must fall, increasing output.
d. as income increases, money demand rises, which increases interest rates.
e. none of the above.

ANSWER

D