Suppose Emma Banks at Bank a and She Writes a Cheque

Suppose Emma banks at Bank A and she writes a cheque to her friend Davis, who banks at Bank B.What happens after the cheque clears?  

A)  Bank A's assets increase, and Bank B's assets increase. 
B)  Bank A's assets decrease, and Bank B's assets decrease. 
C)  Bank A's assets increase, and Bank B's assets decrease. 
D)  Bank A's assets decrease, and Bank B's assets increase.