Taking into account the original statement:
"Alexander Hamilton strongly supported a pro-Federalist interpretation of the Constitution. He supported greater federal powers at the expense of the states' powers. Which of these is a result of Hamilton's federalist beliefs?
a. establishing the first national bank of the United States as a way to manage money across state borders
b. establishing the Department of the Interior to manage government lands and set up national parks
c. the Supreme Court ruling that the rights of the states held more authority over federal law
d. the creation of the Department of the Treasury and the elevation of the Secretary of the Treasury to a Cabinet level position"
The answer is:
a. Establishing the first national bank of the United States as a way to manage money across state borders
With a National Bank, the federal government would be able to manage money across state borders by creating a standard form of currency (At the time, each state had its own) and establishing financial order to pay off the Revolutionary War's debts ( 1775-83) of the several states.
Hope this helps.