People in the south preferred president johnson’s plan for reconstruction over lincoln’s proposal because johnson's plan
a) would allow them to rejoin the union more quickly
b) required that the grandfather clause be removed
c) would allow them to continue to practice slavery
d) allowed southern states to elect former confederate leaders to office

With Congress in adjournment from April to Dec., 1865, Johnson put his plan into operation. Under provisional governors appointed by him, the Southern states held conventions that voided or repealed their ordinances of secession, abolished slavery, and (except South Carolina) repudiated Confederate debts.

So the answer would be D I think . 
Hope that helped.

Everyone.. i would think?

The dethroned emperor!