One major change in United States politics from the 1820s to the mid-1850s was the: a. the decline of competition between parties
b. the collapse of the Democratic Party in the South
c. rise of political parties defined largely by regional interests
d. adoption of an antislavery platform by the Whig Party

a

Explanation:

C) rise of political parties defined largely by regional interests

Explanation: As more white males won the right to vote and political parties became more organized, the character of American democracy changed. It became more partisan and more raucous, a turn that bred ambivalence and even discontent with politics and the dominant parties.

the answer is a new goverment.