9. Vivek buys a book as a birthday present for his father. He purchases the book for

[Leighanne]

$100 with his National? Bank Credit Card. What effect does this transaction have on the money supply?

A. There is no change in the money supply.

B. It eventually increases by $100 times the simple money multiplier.

C. It decreases by $100.

D. It increases by $100

Thanks for your help!