Believed the national government created by the constitution would be too powerful and would eliminate states' power. a. federalists b. anti-federalists

Correct  B. Anti-Federalists

Explanation/context:

The Anti-Federalists opposed ratification of the US Constitution.  The Articles of Confederation, in place prior to the ratification of the Constitution of the United States of America, had granted stronger authority to the states.  Patrick Henry and other Anti-Federalists were concerned about too much power winding up in the hands of the federal government and its executive branch, thus allowing a small number of national elites to control the affairs of the USA.  They feared this also would diminish the rights and freedoms of individual citizens.

The Bill of Rights, laid out in the first ten amendments to the Constitution, provided some reassurance to Anti-Federalists after the fight over ratification, because these amendments to the Constitution served to guarantee that individuals' rights would be protected under federal law.

honestly you should get that checked out because it really isn't normal

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.