[单选题]
A 9.0-V battery costsbrzc;-7j*ph;:fwihb4 rrd+0y 0zl aj,l24 ayd u: rjg-,:j.dovtcr v$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
