What precondition did President Andrew Johnson set for readmitting Confederate states into the Union?

A.

Ten percent of the state's war reparation debt had to be paid to the federal government.
B.

Ten percent of the state's legislators must have been ineligible to vote prior to the Civil War.
C.

Ten percent of the state's government-owned land must have been distributed to former slaves.
D.

Ten percent of the state's population had to sweat an oath of allegiance to the United States.

D. Ten percent of the state's population had to sweat an oath of allegiance to the United States.