Answer:
b. Thomas Jefferson.
Step-by-step explanation:
Thomas Jefferson though consider blacks as biologically inferior, helped many slaves. There are many evidences that proves that after the death of his wife Martha Jefferson he was in a relationship with Sally Hemings a woman of mixed race and they had at-least one or as many as six slaves. Sally remained enslaved by Jefferson until her death and the mystery of Jefferson and Hemings is still open to debate even today.