Why was President Abraham Lincoln's plan for Reconstruction referred to as the "Ten Percent Plan"?

Question

A.
Ten percent of a state's legislators were required to be African American in order for the state to be readmitted to the Union.

B.
Ten percent of a state's debt to the federal government had to be repaid in order for the state to be readmitted to the Union.

C.
Ten percent of a state's agricultural land had to be redistributed to freedmen in order for the state to be readmitted to the Union.

D.
Ten percent of a state's voters had to swear allegiance to the United States in order for the state to be readmitted to the Union.

Answer 1

The correct answer is:

D. Ten percent of a state's voters had to swear allegiance to the United States in order for the state to be readmitted to the Union.

Abraham Lincoln's "Ten Percent Plan" stipulated that a Southern state could be readmitted into the Union once 10% of its voters (based on the 1860 election) took an oath of loyalty to the Union. This was part of his overall approach to Reconstruction after the Civil War.