Step 1: Understand Martin Luther King, Jr.'s views.
Martin Luther King, Jr. was a civil rights leader who fought against racial discrimination. His most famous speeches, such as "I Have a Dream," focus on equality and the end of racial prejudice.
Step 2: Analyze the options.
- (A) caste: Incorrect. Martin Luther King, Jr. focused on racial discrimination rather than caste.
- (B) sex: Incorrect. While King supported gender equality, his primary fight was against racial discrimination.
- (C) religious: Incorrect. Although King advocated for religious tolerance, racial discrimination was his primary concern.
- (D) racial: Correct. Martin Luther King, Jr. is most famous for his advocacy against racial discrimination.
Step 3: Conclusion.
Martin Luther King, Jr. was a strong advocate for ending racial discrimination.