Defoe’s group of four novels are the first literary works devoted to the study of problems of the lower-class people. They are the following EXCEPT（）.

Defoe’s group of four novels are the first literary works devoted to the study of problems of the lower-class people. They are the following EXCEPT（）.
A、Captain Singleton
B、Moll Flanders
C、Roxana
D、Robinson Crusoe
正确答案：D