African kingdoms benefited from the slave trade through all the following EXCEPT A. controlling the arrival of Europeans by selling slaves only in the spring
b. increasing their relative strength through the acquisition of firearms.
c. annexing other kingdoms with the profits from the slave trade.
d. becoming very wealthy by collecting substantial customs duties.

During andrew johnson’s presidency, the radical republicans gained control over policymaking in congress. they had enough power to override any presidential veto. how did the radical republicans use this opportunity? a. they blocked johnson’s weak reconstruction policies by taking charge of the reconstruction plan. b. they extended their support to johnson’s policies for reconstruction of the south. c. they removed johnson from office and took over the task of reconstructing the south. d. they removed all former confederates from office and stopped the south from rejoining the union.