I don't understand why the answer is D but not B. I was stuck between the two and chose B which is wrong but they sound almost identical to me.
B says the main purpose is to evaluate the theory of legal positivism and D says to identify the basic tenets of legal positivism. I don't see how it's doing one without the other.
I feel like I get questions like this wrong very often. Could someone clear it up for me please?