What best explains why the political climate was ripe for a third-party candidate during the 1912 presidential election?

Voters were unsatisfied with the economy.

The Republican Party was unsatisfied with its candidate.

The United States was involved in a world war.

Voters were ready for a radical leader.

Theodore Roosevelt was a member of the Republican party and he wanted to be re-elected as president of the country, but his ideas were disappointing the other members of the party. Some Republicans considered Roosevelt to be "a charlatan, and fraudulent, with his progressive promises and promises like the speeches of a downright and completely unprincipled candidate and self-demagogue."

This Republican dissatisfaction caused Roosevelt to join the progressive party and to launch his candidacy as the third presidential candidate.

Roosevelt held a vigorous national campaign for the Progressive Party, denouncing how the Republican nomination had been "stolen." He defended his reforms under the rubric of "The New Nationalism" and perplexed the country to a strong federal role in regulating the economy and punishing bad companies. although he did not win the election, he obtained more votes than the cadidato republicans and became the first candidate of a third party to receive more votes in the Electoral College than one of the main candidates