English Grammar Error Identification

Directions: The following sentence is divided into four parts (a), (b), (c), (d). One of the given parts is grammatically incorrect. You have to detect the error and indicate your choice. If there is no error mark '(e)' in the answer choice.

I can't understand (a)/ why does my daughter (b)/ not wish to (c)/ go to college. (d)/ No error (e)