Which of These Statements Best Explains Why Anthropologists Are So

Which of these statements best explains why anthropologists are so interested in the question of whether or not gender hierarchy is universal?

A) The existence of societies with gender equality would prove that anthropologists should be working for greater gender equality in other cultures.
B) If many cultures currently have or have had gender equality, this would indicate that modern societies could achieve gender equality.
C) The fact that other cultures have gender equality could be used as evidence that societies with a gender hierarchy are backwards or primitive.
D) This question is incoherent; anthropologists are not particularly concerned with the question of equality.