Critical Reasoning

According to an independent computer-industry analyst, the new Regent microcomputer is of high quality, is fast, and costs less than any currently existing competing model. It is reasonable to conclude, therefore, as the manufacturer's prospectus does, that the Regent will quickly establish itself as a fast-selling, low-priced alternative to currently available microcomputers.
Which of the following, if true, would LEAST weaken the argument above?
(A) Many retailers already carry one or more low-priced microcomputer models and are disinclined to carry another.
(B) Several faster and lower-priced models of microcomputers will soon be introduced by other computer manufacturers.
(C) The Regent Corporation's microcomputer can be used in conjunction with higher-priced microcomputers manufactured by other companies.
(D) Most of those individuals and companies that could be expected to make up the potential market for the Regent microcomputer have already filled their microcomputer needs.
(E) The independent computer-industry analyst whose assessment was incorporated in the prospectus has used measures of quality that are not universally accepted by the computer-buying public.

**Please provide reasoning for your answers

Will go with C

IMO C...

I am pretty sure that the right Answer is C