Answer:
The correct answer is D. Thaddeus Stevens was a Radical Republican who fought for passage of the Fourteenth Amendment.
Step-by-step explanation:
Thaddeus Stevens was an American lawyer, politician, and leader of the radical group of the Republican Party. Above all, he made himself known as a strong opponent of slavery in the United States.
As leader of the radical phalanx of Republicans, Thaddeus Stevens spearheaded the abolition of slavery in the United States and worked throughout his political life for the ratification of the 13th and 14th Amendments to the Constitution, which freed blacks from slavery and gave them citizenship despite of their race. Stevens was feared in the House of Representatives for his rock-hard debate style, and was nicknamed the "dictator of Congress."