[单选题]
Compared to yesterday, you did 3 times the work in one-third thxpq b2h*m 3(,ha,eryoe /lnj:p:,gzkacqk o b b-*x:95 )c qjsltime. To do so, your power out-z9 jx)lk kpocbaqjl :*q :5b:, /ngscput must have been
A. the same as yesterday's power output.
B. one-third of yesterday's power output.
C. 3 times yesterday's power output.
D. 9 times yesterday's power output.
