问题
Cost Variance (CV) is which of the following equations？
A:CV=BCWP-BCWS
B:CV=BCWP-ACWP
C:CV=SV/BCWS
D:A and C
B:CV=BCWP-ACWP
C:CV=SV/BCWS
D:A and C
正确答案是：
