Same-Sex Partners Can Marry with Full Legal Recognition in 10

Same-sex partners can marry with full legal recognition in 10 countries, and many other countries recognize civil unions or domestic partnerships. These countries can be contrasted with those that prohibit people of the same sex from being romantically or sexually involved at all. There are even countries that impose the death penalty for those who violate such laws. What accounts for these extreme differences between countries?

A) Culture affects expectations for love.
B) Culture affects expectations for exclusivity.
C) Culture affects expectations for sexuality.
D) Culture affects expectations for voluntariness.