If one fails to account for implicit costs in decision making, then applying the cost-benefit rule will be flawed because:

If one fails to account for implicit costs in decision making, then applying the cost-benefit rule will be flawed because:
A.the costs will be understated.
B.the benefits will be overstated.
C.the benefits will be understated.
D.the costs will be overstated.
正确答案：the costs will be understated.