(2) Many kinds of fiction are self-explanatory: mysteries, westerns, love stories, spy thrillers, and science fiction define themselves by the terms used to name them. The horror story is less easily defined, perhaps because other types of fiction so often use the trappings of terror to enhance their plots. Charles Dickens used the vehicle of an old-fashioned ghost Story to tell “A Christmas Carol”, but that book is not a horror story. Nor does a Grimm brothers fairy tale such as “Hänsel and Gretel,” with its child-devouring witch, belong to the genre.
In this paragraph, the sentence “Many kinds of fiction are self-explanatory” means（）.
A、they often employ horror to develop their plots
B、they target ordinary readers
C、they are easy to understand
D、their categories show what they are about
【正确答案】：D
【题目解析】：self-explanatory意为自明的，自喻的。此短语后面是冒号，本段一整段都是在解释第一句话。文中提到“define themselves by the terms used to name them.”所以，这些小说的名字就解释了他们的类型，所以D选项符合题意。
