[单选题]
The potential difference between the termin1*x 7:fnt32q xu ufektals of a battery, w *bev9-d4uf jpm57yy 4y bf7xm(uy jq2hen no current flows to an externm*fvbyp j7qu mdjf 4(y7y e x5yub-294al circuit, is referred to as the
A. battery emf
B. terminal voltage
C. battery power
D. battery rating
