What is the difference between the positive and the normative in economics?

(A) A positive question is one for which the answer is yes while normative question is
one for which the answer is no.
(B) Positive questions concern matters of opinion, while normative questions
concern matters of fact.
(C) Positive questions concern matters of fact, while normative questions
concern matters of opinion.
(D) Economic theory can answer normative questions, but not positive ones.