Which of the Following Is True of Sex in Marriage

Which of the following is true of sex in marriage?

A) Older married or cohabiting couples get bored with each other and stop having sex.
B) People stop wanting to have physical relationships and sex as they age.
C) The primary reason people do not have sex later in life is a drop in drive and energy in sexual activity.
D) One of the factors causing a drop in sexual relations and sex drive or energy is gender.
E) The frequency of sex is an insignificant factor regarding marital sexual relations.