A commercial bank has excess reserves of $5000 and a required reserve ratio of 20 percent. It makes a loan of $6000 to a borrower. The borrower writes a check for $6000 that is deposited in another commercial bank. After the check clears, the first bank will be short of reserves in the amount of:
A. $1000
B. $1200
C. $5000
D. $6000