Answer:
It's shortened for "Rhythms and Blues"
Explanation:
It was originated in the '40s when it replaced "race music" as a general marketing term for all African American music. Although, it was more referred to secular, and not religious.
Quick add
Could you please mention which Black American theatre makers were dicussed in the lecture so we can pick a few.
Can't answer without the photo.
It usually catches your eye?
sorry if its not a right answer, but its true
He should work as a photographer in newspaper.