Which tactic did George Creel, the head of the Committee on Public Information, use to gain the support of US citizens for the war? He promised job opportunities in the US military for African Americans from southern states. He promoted anti-German and pro-war propaganda through posters, movies, and booklets. He used slogans such as "Food will win the war" to conserve food for war efforts. He urged congress to pass the Selective Service Act to compel all able US citizens to enlist for draft.