Answer:
The answer is D) In the bebop era, the trombone supplanted the trumpet as the lead solo instrument.
Explanation:
In the bebop or bop era, which consisted of songs that had a much more faster tempo which was not played basically for dancing like swing jazz, the trombone was not played often as a solo instrument; in fact, the trumpet was played a lot, and the bebop era produced great trumpeters. Regarding J. J. Johnson, options a, b and c are true, while option E) is true regarding the challenge experienced by the trombonists.
When the music is relatively continuous, non sectional, and/or non repetitive
