Which is the best claim for an argumentative paragraph?

the benin plaques hold the most unique place in the history of relations between africa and west europe because they are actually made of brass, not bronze.
the benin plaques hold the most unique place in the history of relations between africa and west europe because they document two prominent points of euro­african contact.
the benin plaques hold the most unique place in the history of relations between africa and west europe because their main subject is the oba and his prowess as a hunter and a soldier.
the benin plaques hold the most unique place in the history of relations between africa and west europe because they allowed visitors to admire the achievements of oba and the wealth of the kingdom.

I would contend that the right answer is actually the B) The Benin plaques hold the most unique place in the history of relations between Africa and West Europe because they document two prominent points of Euro­African contact.

Explanation: If you are stating that the Benin plaques hold the most unique place in the history of relations between Africa and West Europe, then you need to explain why. Options A, C and D do not provide coherent justifications, since they refer to the material, the subject matter or their significance, but they do not mention anything about the way in which the plaques were crucial in the relation between those two areas of the world. Only option B explains and argues why - because they document the contact between those places.    

better now, by post malone