Read this sentence from paragraph 5 of “Stars and Stripes Forever.” “He was the prolific composer of 15 operettas, 70 songs, numerous overtures, concert pieces, vocal works, waltzes, books and articles, along with his 136 marches.”

What is the author’s purpose for including this sentence?

A.
The author wants to show that Sousa was a musician his entire life.

B.
The author wants to show that Sousa rarely revised his compositions.

C.
The author wants to show that Sousa worked in many different areas as a musician.

D.
The author wants to show that Sousa broke with traditions among American band leaders.