What Is a Major Difference Between Descriptive Ethics and Normative

What is a major difference between descriptive ethics and normative ethics?

A) Normative ethics concerns moral beliefs, whereas descriptive ethics concerns moral behaviors.
B) Normative ethics implies that some people's moral beliefs are incorrect, whereas descriptive ethics does not.
C) Descriptive ethics cannot be done properly before doing normative ethics.
D) Descriptive ethics is not a scientific topic of study, whereas normative ethics is.