Why is louis armstrong considered a jazz legend
a. for becoming the first white musician to contribute to jazz
b. for his ability to play the trumpet and his subtle sense of improvisation
c. for being the highest-paid african american entertainer
d. for predicting that america will be best remembered for the constitution, baseball, and jazz

Louis Armstrong is considered a jazz legend because of b) for his ability to play the trumpet and his subtle sense of improvisation. Louis Armstrong was an American jazz trumpeter, singer and one of the pivotal and most influential figures in jazz music. He was seen as an inventive musician and he was easily recognized with his gravelly voice.

The answer is challenging and taxing because arduous means when something is hard and tiring and the excerpt provides clear detail why that's the answer