Which of the Following Claims Concerning the Importance of Effects

Which of the following claims concerning the importance of effects that explain the slope of the U.S.aggregate-demand curve is correct?

A) The exchange-rate effect is relatively small because exports and imports are a small part of real GDP.
B) The interest-rate effect is relatively small because investment spending is not very responsive to interest rate changes.
C) The wealth effect is relatively large because money holdings are a significant portion of most households' wealth.
D) None of the above is correct.