Refer to the Information Below,after a Deposit of $10 Billion

Refer to the information below,after a deposit of $10 billion of new currency into a chequing account in the banking system,the maximum amount by which the chartered banking system can expand the supply of money is:
Consolidated balance sheet for the chartered banking system.Assume the desired reserve ratio is 10 percent.All figures are in billions.

A) $9 billion.
B) $45 billion.
C) $36 billion.
D) $90 billion.