Answer:
The official name of Roosevelt's third party - also known as the Bull Moose party - was the Progressive party (option c).
Explanation:
The Progressive Party was born in 1912, as a result of Theodore Roosevelt's discontent with the unprogressive policies of Republican Party Chairman William Howard Taft, who had previously had his support.
Roosevelt decides to run again as a presidential candidate, but when he is denied the support of his followers in the Republican Party, he forms his own party.
The progressive base that formed the newly founded party included constitutional review and reform, social care for women and children, participation of women in the vote, labor guarantees for workers -in terms of compensation and health- among others.
The name Bull Moose party is due to Roosevelt's own words, who said he felt strong as a "Bull Moose" to return to the presidency.