Which is the king of all subjects?

The subject which is difficult is the king

The answer is:

Explanation:

In my opinion its Social Studies since it is the most difficult..

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answer; (d) anthropology;

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.