Final answer:
Dizzy Gillespie was indeed a bebop jazz musician, playing a significant role in the development and popularization of bebop.
Step-by-step explanation:
True
Dizzy Gillespie was indeed a bebop jazz musician. He was one of the pioneers of the bebop movement and is considered one of the most influential trumpet players in jazz history. Bebop was a style of jazz that emerged in the 1940s, characterized by complex harmonies and fast tempos. Gillespie, along with other musicians like Charlie Parker and Thelonious Monk, played a significant role in the development and popularization of bebop.