Cassius Clay changed his name because to express Black power.
Answer: Option D
Step-by-step explanation:
Cassius Marcellus Clay Junior came out with the name “Mohammad Ali” in 1964 and declared his former alias as his slave name. He was involved in meetings by Nations Of Islam since 1961 and he continued with target to ameliorate the scenario of African-Americans in the United States by associating with African American Islamic religious movement and this phase of his life is considered driving force to change his name and express “Black Power”. And finally, he expected from public too that “Mohammad Ali” should be understood as a free name inspite of Cassius Clay, which is a slave name.