Regarding Masturbation, Which of the Following Statements Is FALSE

Regarding masturbation, which of the following statements is FALSE?

A) Self-stimulation has been observed in infants under one year of age.
B) Female masturbation most often involves rubbing inside the vagina.
C) Of those surveyed, 89 percent of women and 95 percent of men reported that they had masturbated at some time.
D) Approximately 70 percent of married women and men masturbate at least occasionally.