Question

The Republican party became strong in the South, in part because
a. millions of Southern African American men became voters.
b. the party did not require a loyalty oath in order to vote.
c. many white Southerners attended the state constitutional conventions.
d. all of the former Confederate states had met the requirements to rejoin the Union.

Answer 1

The Republican party became strong in the South, in part because "c. many white Southerners attended the state constitutional conventions" and the Republics actively recruited them.