大全Test 3, Problem 4

Which of the following best completes the passage below?

Sales compaigns aimed at the faltering personal computer market have strongly emphasized ease of use, called user-friendliness. This emphasis is oddly premature and irrelevant in the eyes of most potential buyers, who are trying to address the logically prior issue of whether_______

A. user-friendliness also implies that owners can service their own computers

C. currently available models are user-friendly enough to suit them

E. they have enough sensible uses for a personal computer to justify the expense of buying one

The correct answer is E. But I have no idea why A and C are incorrect but E is correct.

Please help. Many thanks: )