When $1 million is deposited at a bank, the required reserve ratio is 20 percent, and the bank chooses not to hold any excess reserves but makes loans instead, then, in the bank's final balance sheet,

A) the assets at the bank increase by $800,000.

B) the liabilities of the bank increase by $1,000,000.

C) the liabilities of the bank increase by $800,000.

D) reserves increase by $160,000.

Can you explain why? Not just the answer? Thank you!