A major progressive business reform that President Taft enacted was breaking up large monopolies. option D is correct.
He aimed at breaking up large business collaboration by the Sherman Antitrust Act. During his term in office, hearings on the United States Steel began, which was acquiring the coal, railroad, and iron.
William Howard Taft served as president of the United States (1909–1913) and the tenth chief justice of the United States (1921–1930), the only person to have held both offices.
