Which Generalization Was NOT Supported by Masters and Johnson's Human

Which generalization was NOT supported by Masters and Johnson's human sexuality research

A)  Men are more apt to be multiorgasmic than women are. 
B)  The subjective experience of orgasm is very similar for men and women. 
C)  Women are more apt than men to have intercourse without orgasm. 
D)  Sexual difficulties are most typically caused by psychological factors.