Which of the following best describes sentence 5 in the paragraph below?

In the 1940s, jazz underwent a major change. Players began to include more notes in their harmonic palette. For the most part, earlier players had stuck to the major and pentatonic scales in their improvisation and accompaniment. The younger bop players added flats and raised fifths, ninths, elevenths, and thirteenths. The sound was so new that one old-guard musician, none other than Cab Calloway, referred to it derogatorily as "Chinese music."

A.
Concluding sentence

B.
Thesis statement

C.
Topic sentence

D.
Supporting evidence