Isabel Receives a Check for $7,000 from Kermit and Deposits

Multiple Choice

Isabel receives a check for $7,000 from Kermit and deposits it in her bank. Suppose that the reserve ratio is 10 percent. As a result of this transaction the money supply will

A) increase by $70,000.
B) decrease by $63,000 and then increase by $70,000.
C) decrease by $70,000 and then increase by $63,000.
D) not change.