Question

which is a scholarly source for an informative essay on african american musicians? a blog that posts fan reviews of new music releases a book on the history of jazz music in the united states a message board that discusses american rock bands a website that includes videos of interviews with musicians

Explanation:

Scholarly sources are authoritative, research-based works focused on academic topics. Jazz has deep roots in African American musical traditions, so a book on U.S. jazz history is a scholarly, peer-reviewed/academic source relevant to African American musicians. The other options are non-scholarly: fan blogs, message boards, and unvetted interview websites lack academic rigor.

Answer:

a book on the history of jazz music in the United States