求问曼哈顿第五版的一道逻辑题！！问两句话的role的

ginger200800113

Innovative Design

Products with innovative and appealing designs relative to competing products can often command substantially higher prices in the marketplace. Because design innovations are quickly copied by other manufacturers,many con­sumer technology companies charge as much as possible for their new designs to extract as much value as possible from them. But large profits generated by the innovative designs give competitors stronger incentives to copy the designs. Therefore, the best strategy to maximize overall profit from an innovative new design is to charge less than the greatest possible price.

In the argument above, the two portions in boldface play which of the following roles?

(A) The first is an assumption that supports a described course of action; the second provides a consideration to support a preferred course of action.

(B) The first is a consideration that helps explain the appeal of a certain strategy; the second presents an alternative strategy endorsed by the argument.

(C) The first is a phenomenon that justifies a specific strategy; the second is that strategy.

(D) The first is a consideration that demonstrates why a particular approach is flawed; the second describes a way to amend that approach.

(E) The first is a factor used to rationalize aparticular strategy; the second is a factor against that strategy.

正确答案是C，想问为什么不是B呢？
                                
  
                                
                        
               

fxxxfxxx

答案应该是B