As the civil war drew to a conclusion, the chief concern of republicans in congress was that
a. they were being pressured to enact legislation granting social equality to african-americans
b. the economy would have a difficult time adjusting because of the loss of slave labor on southern plantations
c. the return of confederate states to the union might hamper their plans for continued industrial development
d. the wade-davis bill sought to grant blanket pardons to ex-confederates