Leader of one of the few white bands regarded as "hot" by black jazz musicians; he popularized swing for the broader American population; in a racially segregated America, he crossed the color line by hiring African Americans to play in his combos:

a. Walter Page
b. Charlie Christian
c. Billy Bauer
d. Cootie Williams

The correct option that the above statement is referring to is option A. Walter Page

Explanation:

The leader was the chunky, charming looking individual playing the bass and multiplying on the baritone. His name was Walter Page, and around then the band was known as Walter Page and his Blue Fiends.

In any case, you could likewise hear the artists tending to him by his nickname, which was 'Big Un'. You could likewise tell immediately that they didn't simply regard him since he was the leader; they truly preferred him and felt near him since he was additionally one of them.