Final answer:
e: it is a cultural universal.
Marriage is a cultural universal and exists in all societies, although the specific customs and practices may vary.
Step-by-step explanation:
The statement that is true about marriage is: e: it is a cultural universal.
Marriage is a socially recognized union that exists in all cultures, although the specific customs and practices may vary. It serves various functions, including providing a structure for raising and nurturing offspring, creating alliances between individuals and families, and providing social and economic benefits to couples. While there may be cultural and legal differences in how marriage is defined and recognized, the institution of marriage is universal across societies.