If Moral Relativism Is True, One Troubling Implication Is That

If moral relativism is true, one troubling implication is that

A) Everyone has to agree about morality.
B) Linguistic communication would be impossible, since everyone means different things even when they use the same words.
C) Many seeming genuine moral disagreements are not in fact so. People are just talking past each other.
D) There are no troubling implications of moral relativism.