B. Male voters had a greater effect on election votes
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Johnson was pro-slavery and during reconstruction he was lenient towards leaders of the confederacy. Meanwhile, Radical Republicans wanted to punish the South for the Civil War, and they wanted to keep their party in power in the government for both the North and the South. Remember for later, the civil war was driven by westward expansion and power. While slavery had a lot to do with the cause of the war, Johnson and Radical Republicans were driven by their want for power.
C. Germany was the most influential immigrant group
It was a phrase used to justify European Imperialism in the 19th and early 20th centuries. The phrase implies that imperialism was motivated by a high-minded desire of whites to uplift people of color.
The goal mainly used to justify them at the time was to recapture the Holy Land from invading Muslims.