GMAT Critical Reasoning (CR) | Re: A manufacturer of workstations for computer-aided design seeks

There are many subtitles of a bonus component that could affect the purchase decision. Some scenarios include - bonus from buyer or seller, bonus calculation method[a percentage of the sales or savings] and so on.

Since weighing so many options is not possible how is E the correct answer when A has very low scope of digressing from the point raised in the question?

A. The proposed list prices would seem low to a typical buyer for the manufacturer’s most important corporate customers.