[单选题]
A 9.0-V battery costfi8--sas ygmoq ) u6;xs4gzjmeau- .acd65vife*w5 a 7$1.49, and will run a portable CD player for 6.0 hours. Suppose the battery supplies a current of 25 mA to the player. What is the cost of energy in dollars per kWh?
A. $11/kWh
B. $110/kWh
C. $1100/kWh
D. $11,000/kWh
