The salesman showed her several MP3s and she chose one as she didn't want to spend too mu

问题补充：

The salesman showed her several MP3s and she chose one as she didn want to spend too much money on it.

A. the less expensive

B. less expensive

C. the least expensive

D. least expensive

答案：

A. the less expensive

B. less expensive

(答案→)C. the least expensive

D. least expensive

解析：几个MP3中最便宜的，要用最高级表示。expensive为多音节形容词，所以应为the least expensive。