【单选题】回答下列各题: Marriage emerged as the most popular institution throughout history primarily because it was an effective arrangement to improve the care and upbringing of children. Marriage is not necessary ...
A.
It is primarily a necessary step to have children.
B.
It meets resistance in Western and other rich countries.
C.
It has a tremendous impact on the rearing of children.
D.
It is the most important institution throughout history.