Which of the Following Statements About Marriage Is True

Which of the following statements about marriage is true?

A) Marriage occurs in every culture and is found in identical form wherever and whenever it exists.
B) Marriage occurs in every culture in some form, but its exact characteristics vary widely.
C) Marriage occurs in only a few cultures, but is found in identical form wherever and whenever it exists.
D) Marriage occurs in only a few cultures, but takes a unique form wherever and when ever it exists.
E) Marriage occurs in every culture in some form, and that form does not change over time.