The fourteenth amendment:
a) passed despite the opposition of charles sumner
b) specifically defined suffrage as one of the vicil rights to which freedpeople were entitled
c) represented a compromise between the moderate and conservative positions on race
d) marked the most important change in the u. s. constitution since the bill of rights

Option D, marked the most important change in the U.S. Constitution since the Bill of Rights, is the right answer.

Explanation:

Adopted on 9th July 1868, Amendment Fourteenth to the U.S. Constitution was one of the Reconstruction Amendments. This amendment conferred citizenship and equal civil and constitutional rights to the African American community and slaves got a release from slavery following the Civil War in America. In this way, this amendment provided the community of African Americans with citizenship and equal protection of the laws.

Due to this, the Fourteenth Amendment marked the most vital change in the Constitution of the United States since the Bill of Rights.