[单选题]
A 9.0-V battery cost 1max9i lvslsp2r9k92 sx.o0k1v ek ,uzlf mx)8$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
