Which of the following should be considered when you evaluate the thesis statement of a critical essay?

Which of the following should be considered when you evaluate the thesis statement of a critical essay?
A. Is it a complete sentence?
B.Is the issue both narrow & broad?
C.Is any reasons included?
D.Is the position clear & debatable?
正确答案： Is it a complete sentence?；Is the issue both narrow & broad?；Is the position clear & debatable?