Its b because Washington became the Continental army's commander-in-chief in 1775, which was good for the republic. He was the best person to lead a group of troops that were unprepared.
Top-Down is used to refer to a situation in which decisions are made by a few people in authority rather than by the people who are affected by the decisions
The use of a song to learn and retain information is known as the music mnemonics. The music mnemonics works the same way as someone recalling the lyrics of the song just as one can recall important details and information using a song. hope this helps. Therefore it would be B.