D_Ivan IV my answer has to have more words to post it dont mind this
The main way in which the 16th and 17th amendments enhanced the power of the national government is that the 16th amendment allowed the federal government to tax personal income, while the 17th amendment allowed for senators to be elected directly by the voters.
The answer is B. Mississippi River and the Atlantic Ocean.
D: prohibiting Mormons from holding public office in the Utah Territory.