Which Statement Describes the Major Criticism of Sigmund Freud's Psychosexual

Which statement describes the major criticism of Sigmund Freud's psychosexual theory of human development?

A) He focused too much on sexuality, and it is hard to reduce human development to a single motive.
B) He studied children excessively and spent too much time on experimental methods.
C) He underemphasized the significance of childhood and overemphasized later time periods.
D) He spent too much time studying a diversity of subjects and people from varying ages.