单项选择题

A.2.7V+2300mAh=2302.7Wh
B.2.7V-(2300÷1000)Ah=0.4Wh
C.2.7V×(2300÷1000)Ah=6.21Wh
D.2.7V÷(2300÷1000)Ah=1.17Wh