This one is fairly direct. Florida is the state that was in doubt in the 2000 Presidential Election. Both candidates had fought hard for all of the states that were "toss- ups" but no greater intensity emerged than the one in Florida. Many in the Democratic circles believed that if Al Gore had won Florida, the 2000 election would have been his. At the same time, a Bush strategy to the White House could not avoid Florida. Both candidates campaigned intensely and with zeal in Florida. Election night results first declared Florida for Al Gore, the Democrat, and then when exit polls proved to be misleading, news networks moved the state to the "undecided" column, while others declared it for Bush. In the end, the other 49 states had been decided and counted with neither candidate having reached the 270 electoral vote "magic number." Both candidates needed Florida and only one could have it. Thus began the winter of recounts, hanging chads, dimpled chads, and the Supreme Court decision in Gore v. Bush where a 5-4 vote halted the recount and awarded Bush the state of Florida.
The best answer to this question is D. Florida was the key state in this election.
In the 2000 presidential election, the vote in the Electoral College was very close. The result of the election ended up coming down to the result of the Florida election. The announcement of the results of the election in Florida was slowed for a long time by disputes over the voting. The result was very close and was subject to recounts and to court battles over those recounts that ended up being decided by the Supreme Court of the United States.