Suppose You Found $10,000 Hidden Under a Rock and Deposited

Suppose you found $10,000 hidden under a rock and deposited it in a demand deposit account at your bank. If the reserve requirement was 20 percent, your deposit would initially add ____ to total demand deposits and over time increase the money supply by a maximum of ____.

A) ​$2,000; $4,000
B) ​$2,000; $40,000
C) ​$10,000; $40,000
D) ​$10,000; $50,000