It was difficult for Congress to fulfill its duties under the Articles of Confederation because Congress lacked the power to regulate foreign trade, and most congressional decisions required the approval of at least nine states.
The correct answer to this question is A. Expressed powers. These are mentioned in the Constitution, such as print money and declare war, at a national level, whereas inherent and implied power are those which come from the interpretation of the literacy of the Constitution, in other words, those which go beyond the expressed powers.
What war? Need to know what war or else there are thousands of answers.
It is letter C because plantations were farms that encouraged slavery