Which of the Following Is an Accurate Description of Marriage

Which of the following is an accurate description of marriage worldwide?

A) Men tend to be older than women they marry in developed countries,but not in developing countries.
B) Men tend to be older than women they marry in developing countries,but not in developed countries.
C) The age difference between women and men who marry is fully explained by the high rates of arranged marriages in some countries pairing older men and younger women.
D) Across the world,men tend to be older than women they marry.