I believe it's <span>B) He became a cotton farmer in the Deep South.
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It is b beacause the American Association for restored peapole.
No, it is false that the music industry shrank during the 1970s since few people were interested in disco, since in fact the exact opposite happened: Many people were wildly interested in disco so the music industry boomed.
The best option from the list would be that "Horace Mann" is best associated with education reform in the U.S., since he sought to reform the system before "reform" in the realm of education was popular.