Final answer:
Reverend Jesse Jackson was the advocate for the use of "African American" over "Black" to emphasize historical and cultural heritage. Option c
Step-by-step explanation:
The advocate for the use of the term "African American" instead of "Black" was Reverend Jesse Jackson. He was a prominent civil rights figure and led the organization People United to Serve Humanity (PUSH), which worked on various social and civil rights issues. His involvement in politics, including running for the Democratic presidential nomination, increased his influence and credibility.
It was during this time, specifically in the 1980s, that Jackson and other leaders began to encourage the use of "African American" as a way to emphasize the historical and cultural heritage of Black Americans. Option c