Louis Armstrong is considered influential in the history of jazz for several reasons:
A. The music he played was improvised and creative, setting the standard for future jazz musicians. Armstrong's innovative and virtuosic style of playing the trumpet revolutionized jazz music. His improvisational skills and unique phrasing techniques inspired generations of musicians and set a new standard for creativity in jazz.
D. Although he made only a few records, his record sales exceeded those of Michael Jackson. Armstrong's commercial success and popularity helped bring jazz music to a wider audience. His record sales demonstrated the appeal and impact of his music, solidifying his influence on the history of jazz.
These factors, among others, contribute to Louis Armstrong's status as one of the most influential musicians in the history of jazz.