Many Modern Psychologists Are Critical of Freud's Theory of Psychosexual

Many modern psychologists are critical of Freud's theory of psychosexual stages. Why?

A) Most research suggests there are more stages than the five Freud proposed.
B) Most research suggests there are fewer stages than the five Freud proposed.
C) Most research suggests that people become fixated at several stages, rather than just one.
D) Freud's theory is so vague that meaningful research on it is nearly impossible.