When the constitution was first ratified, only white men of a certain age were considered citizens. later amendments to the constitution have affected americans' participation in government. amendment 15 was a result of

It was the result of the reconstruction process that followed the civil war.

Explanation:

The Fifteenth Amendment (1870) is one of the Post-Civil War Amendments, known as the Reconstruction Amendments. This amendment prohibits states or the federal government from using a citizen's race, color, or previous state as a slave as a restriction to the vote. Its basic objective was to grant the right to vote to former slaves. The first person to vote under the stipulations of the amendment was Thomas Mundy Peterson who cast his vote in an election to the school board in Perth Amboy held on February 4, 1870, the day after the fifteenth amendment was ratified. But it was not really until the Voting Rights Act in 1965, almost a century later, that the full promise of the fifteenth amendment was actually achieved in all states.

the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism

c. had saved colonel cresap's family from attack by other native americans.