Obstacles Louis Armstrong faced

One of the obstacles that armstrong had to deal with was his life at a young age. His Father left his mother right after he was born, also his mother would earn money by being a prostitute. He lived with his grandmother until he was sent to a boy home for waif's.

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d

explanation:

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain