Final answer:
Benny Carter's arranging style is most distinguished by his use of dissonant harmonies, which added depth and complexity to the music, making it a hallmark of his work.
Step-by-step explanation:
The most distinctive aspect of Benny Carter's arranging style is his use of dissonant harmonies. Unlike some jazz composers who focused on creating simple and straightforward melodies, or prioritized complex rhythms, Benny Carter's style was notable for his innovative use of harmony. His arrangements often featured an adventurous approach to harmony, including dissonance that added depth and complexity to the music, setting his work apart from others. While he did not shy away from employing intricate rhythms or showcasing brass instruments, it is the use of dissonant harmonies that remains the most distinctive element of his arranging style.