The main function of the federal office of war information was to

The Office of War Information, widely known by its acronym OWI, was a Federal agency during World War II in charge of the dissemination of all official news in the United States and abroad and of propaganda abroad

The correct answer is C. National Labor Union

Explanation:

William Sylvis was an American leader during the 19th century, mainly known for its role in labor unions. Indeed, Sylvis was the first member of a trade union movement Philadelphia, later he supported different unions during the civil war and finally, he decided to create a labor and trade union as he dreamt of a union that integrated multiple workers and sectors. In this way, by 1866 William Sylvis founded the National Labor Union, which as the first union of this kind and integrated multiple local unions. Therefore, the name of the union William Sylvis founded was the "National Labor Union".