d. fully embraced the expanded powers of the federal government born during the Civil War.
Explanation:
Radical republican refers to a faction of the republican party members who were extreme in their policies during the American Civil War. This group largely contained politicians from northern free states. They championed the rights of Blacks, took staunch stand-towards prohibition of slavery, and enfranchisement of the blacks citizens. They blame the South for the war and destruction it brought. The group was dissolved by 1870's, accomplishing almost all their goals.
