The correct answer to this open question is the following.
Although you forgot to attach the options for this question we can say the following.
According to the Wade-Davis Bill, what needed to happen before a former Confederate state could be readmitted to the United States was: "The state would need to make sure that at least half of its freed slaves voted in elections."
After the end of the American Civil War, United States President Abraham Lincoln ordered Reconstruction in the southern states and established the famous "10 Percent Plan" to readmit confederate states to the Union.
However, there were many so-called radical Republicans in US Congress who opposed Lincoln's plan for considering it too mild. These Republicans demanded more severe punishment for the confederates.
That is when Republican Representative Henry Winter Davis and Senator Benjamin F. Wade created the Wade-David Bill that required the loyalty oath of 50% of white men in each state and the right to vote for blacks.