[求助]紧急的--一道攻击方法题，请帮助！

(XDF)41

Advertiser: The revenue that newspaper and magazine earn by publishing advertisements allows publishers to keep the prices per copy of their publications much lower than would otherwise be possible. Therefore, consumers benefit economically from advertising.

Consumer: But who pays for the advertising that pays for low-priced newspaper and magazines? We consumers do, because advertisers pass along advertising costs to us through the higher prices they charge for their products.

问消费者是怎样攻击广告商的？

(A) By alleging something that, if true, would weaken the plausibility of the advertiser’s conclusion. （为什么正确？）

By questioning the truth of the purportedly factual statement on which the advertiser’s conclusion is based. (为什么错？)