In the Context of the Buying Process, Which of the Following

In the context of the buying process, which of the following is a purpose of the detailed specifications that describe exactly what buyers expect and require?

A) They help buyers develop and submit proposals as specified by selling firms.
B) They guide buyer firms in developing their proposals.
C) They provide buyers a framework for evaluating, comparing, and choosing among the proposed solutions.
D) They create new value opportunities for buyers.
E) They assist buyers in evaluating suppliers and products based on weighted averages across desired characteristics.