What is true about bebop?
a. it featured frequent chord changes.
b. it was meant to be danced to.
c. it was one of the slower forms of jazz.
d. all of the above.

A. It featured frequent chord changes.

Explanation:

Bebop is a jazz style that was created in the 1940s. It has a fast tempo with difficult chords that change fast. This style was developed as a music that was not meant to be danced to but to be listened as opposed to the consideration of jazz as a dance-oriented style until that moment. According to this, the sentence that is true about bebop is that it featured frequent chord changes.