Answer: D. They were third-party candidates who sought presidential election
Explanation:
First, we should note that third-party candidates are the candidates from other parties apart from the Democratic and the Republican parties.
Ralph Nader is a lawyer and he was a four time candidate of the president of the United States in 1996, 2000, 2004 and also 2008. On the four occasion, he got less than 5% of the total votes.
Henry Ross Perot was an American billionaire, philanthropists and business magnate. He was a third-party candidates who sought presidential election in 1996 where he established the Reform Party.
Therefore, the answer is option D.
