Suppose the local slaughterhouse gives off an unpleasant stench. The price of meat would then be _ because not all of the _ are accounted for in the marketplace.

Suppose the local slaughterhouse gives off an unpleasant stench. The price of meat would then be _ because not all of the _ are accounted for in the marketplace.
A.too high; benefits
B.too high; costs
C.too low; costs
D.too low; benefits
正确答案：too low; costs