Question

how did john quincy adams become president in 1824?
john quincy adams had served in the house of representatives, so they supported him.
henry clay threw his support to adams when the contest went to the house of representatives.
william crawford and henry clay cancelled each other out, so adams gained a majority.
andrew jackson withdrew from the election when he did not win enough electoral votes.

Explanation:

In the 1824 U.S. presidential election, no candidate received a majority of electoral votes. The election was decided in the House of Representatives. Henry Clay, who was Speaker of the House and also a candidate, threw his support to John Quincy Adams, which influenced the outcome in Adams' favor.

Answer:

Henry Clay threw his support to Adams when the contest went to the House of Representatives.