单选题

In context, which of the following is the best revision of sentence 3 (reproduced below)?That thing that makes them want to do it is called an incentive, and what makes them not want to do them would be a disincentive.

A It is an incentive making someone want to do something, and a disincentive making them not want to do it.

B An incentive is what makes someone want to do something, and a disincentive is what makes someone want to avoid doing something.

C Incentives make someone want to do things, but disincentives are the things making them not want to do it.

D People are made to want to do something by incentives, and a disincentive is for not wanting to do it.

E It is incentives that make people want to do something, disincentives on the other hand being what makes people want to avoid doing something.

解析：
这个句子是明确“incentive，disincentive”的定义。A使用代词it，没有一个清晰地先行词，且使用两个不恰当的分词短语。C的定义冗杂，使用代词it，没有一个明确的先行词。D和E的定语既不符合平行结构也不恰当。只有B的定义最有效最简洁。