Why was Booker T. Washington often criticized by civil rights leaders such as W. E.B. Du Bois? Group of answer choices

A. for encouraging African Americans to use violent tactics as a means by which to force changes in government policy

B. for encouraging African Americans to emigrate from the United States to Africa and start new lives for themselves and their families

C. for arguing that African Americans had not been citizens of the United States long enough to be entitled to the same rights awarded to others

D. for arguing that African Americans should focus on establishing themselves in society through hard work and education before fighting for civil rights