What Is the Main Difference Between Transvestism and Transvestic Disorder

What is the main difference between transvestism and transvestic disorder?

A) Males with transvestic disorder fantasize about having female body parts and vice versa.
B) People with transvestic disorder cross-dress on a daily basis instead of just for sexual pleasure.
C) People with tranvestic disorder associate cross-dressing with sex whereas transvestism alone is not associated with sexual arousal.
D) People with transvestic disorder are distressed by their desire to cross-dress.