Tony Lai Deposits $200 in Currency in His Checking Account

Tony Lai deposits $200 in currency in his checking account at a bank. This deposit is treated as:

A) a subtraction of $200 from the money supply because the $200 in currency is no longer in circulation.
B) an addition of $200 to the money supply because of the creation of a checkable deposit of $200.
C) an addition of $200 to the money supply because the bank holds $200 in currency and the checking account has been increased by $200.
D) no change in the money supply because the $200 in currency has been converted to a $200 increase in checkable deposits.