Who is the leader of the U. S. House of Representatives? How are they chosen?

The presiding officer is the Speaker of the House, who is elected by the members thereof (and is therefore traditionally the leader of the controlling party). The Speaker and other floor leaders are chosen by the Democratic Caucus or the Republican Conference, depending on whichever party has more voting members.

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b. martin luther king jr. wrote and spoke "i have a dream"

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i know this 100 percent is correct   b. is the best one. < 3