Answer:
a. True
Step-by-step explanation:
Louis Armstrong is widely regarded as one of the greatest jazz musicians of the twentieth century. His contributions to jazz as a trumpeter, vocalist, and bandleader were groundbreaking and highly influential. Armstrong's innovative playing style, improvisational skills, and charismatic stage presence revolutionized the genre and had a significant impact on the development of jazz music. He remains an iconic figure in jazz history and his recordings continue to be celebrated and studied by musicians and music enthusiasts around the world.