What three groups made up most of the republican party during reconstruction?

The African Americans, the scalawags, and the carpetbaggers.

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful. 

that would be the steamboat because none of the other things are forms of transportation