Final answer:
The deadlock in the Electoral College during the election of 1800 was resolved by the House of Representatives, who ultimately chose Thomas Jefferson as President after 36 ballots. The correct answer is option c.
Step-by-step explanation:
Despite Thomas Jefferson winning a majority of the popular vote and a majority of votes in the Electoral College during the election of 1800, a deadlock in the Electoral College led the election to being decided in the House of Representatives. This was due to Jefferson and his running mate Aaron Burr receiving an equal number of electoral votes. The House of Representatives voted repeatedly until Jefferson was chosen as President after a majority was finally achieved on the thirty-sixth ballot, with some influence from Alexander Hamilton.
The decision of the election by the House of Representatives set a precedent and highlighted a significant flaw in the Electoral College system at the time, which was later addressed with the ratification of the Twelfth Amendment. It also marked a remarkable moment in American history due to the peaceful transfer of power between political parties, famously known as the "Revolution of 1800".