很模糊一道逻辑题

这道题给出的答案是C，可我觉得5个都不是正确答案，NN们指点一下！

In many surveys, American consumers have expressed a willingness to spend up to 10 percent more for products that are ecologically sound. Encouraged by such surveys, Bleach-O Corporation promoted a new laundry detergent, Bleach-O Green, as safer for the environment. Bleach-O Green cost 5 percent more than typical detergents. After one year, Bleach-O Green had failed to capture a significant share of the detergent market and was withdrawn from sale.

Which of the following questions is LEAST likely to be relevant in determining the reasons for the failure of Bleach-O Green?

(A) How effective as a detergent was Bleach-O Green?

(B) How many other detergents on the market were promoted as safe for the environment?

(C) How much more did Bleach-O Green cost to manufacture than ordinary detergents?

(D) To what extent did consumers accept the validity of Bleach-O Green advertised and promoted to consumers?

偶要再思考一下，我觉得这两者是有区别的，曾经看过某大牛的讲解。

还是偶理解有误，刚才翻到了OG97:

97.Leaders of a miners’ union on strike against Coalco are contemplating additional measures to pressure the company to accept the union’s contract proposal. The union leaders are considering as their principal new tactic a consumer boycott against Gasco gas stations, which are owned by Energy Incorporated, the same corporation that owns Coalco.
Answer to which of the following questions is LEAST directly relevant to the union leaders’
consideration of whether attempting a boycott of Gasco will lead to acceptance of their
contract proposal?
(A) Would revenue losses by Gasco seriously affect Energy Incorporated?
(B) Can current Gasco customers easily obtain gasoline elsewhere?
(C) Have other miners’ unions won contracts similar to the one proposed by this union?
(D) Have other unions that have employed a similar tactic achieved their goals with it?
(E) Do other corporations that own coal companies also own gas stations?

OG的解释：Whether corporations, other than Energy Incorporated, that own coal companies also own gas stations is not directly relevant to whether attempting a boycott of Gasco gas stations will coerce Coalco to accept the contract proposal . Thus choice E is the best answer.

谢谢两位版主的解答！

很精彩的总结，偶要找些题目再印证一下！