What Best Explains Why Most Cultures Emphasize Male-To-Female 'Gender Crossovers

What best explains why most cultures emphasize male-to-female 'gender crossovers' (e.g., the Zuni 'lhamana') rather than female-to-male 'gender crossovers'?

A) There are more patriarchies than matriarchies.
B) There are more matriarchies than patriarchies.
C) It is more biologically common.
D) Male roles are easier to transition into from childhood than female roles are.
E) Male roles are harder to transition into from childhood than female roles are.