Final answer:
Option (a), Andrew Jackson was a strong advocate for the removal of American Indian tribes and played a key role in enforcing their relocation westward through the Indian Removal Act of 1830.
Step-by-step explanation:
Andrew Jackson's role in the removal of American Indian tribes was significant as he advocated for and enforced their removal. Jackson, known for his Indian fighting background, believed that civilization and progress necessitated the removal of Indians.
With his firm commitment to removing Native residents from southern states, he urged Congress to pass the Indian Removal Act of 1830, which led to the displacement of the Five Civilized Tribes, including the Cherokee, Creek (Muskogee), Choctaw, Chickasaw, and Seminole, to lands west of the Mississippi River. This act is a stark example of Jackson's endorsement of policies that would clear the lands for white settlement and his participation in what is now viewed as an ethnic cleansing.