Answer:
<em>Well, Your answer will be is </em><em>A.</em>
<em>Good Luck!~</em>

Answer:
Loss of Republican Party discipline, the Panic of 1819, the Supreme Court case of McCulloch v. Maryland , and the Missouri Crisis of 1820 all contributed to the decline in the political consensus—leading to the end of the “Era of Good Feelings.”
Explanation:
true is the answer hope this helps