Which of the following sociologists is best remembered for being an outspoken critic of racism?

The correct answer is B. W. E. B. Du Bois.

W. E. B. Du Bois was a prominent African American sociologist, historian, and civil rights activist who is best remembered for his critique of racism and his work in advocating for social justice and civil rights for African Americans. He emphasized the importance of understanding race relations and the impact of systemic racism on society.