The correct answer is A) wrote two bills expanding naval strength.
The greatest impact of the accomplishment of Carl Vinson on World War II was that he wrote two bills expanding naval strength.
The largest procurement bill of the United States was the “Two-Ocean Navy Act” of July 19, 1940. The proposals of the Act were Carl Vinson(Head of the Naval Affairs Committee in the House of Representatives) and David I. Walsh (Head of the Naval Affairs Committee in the Senate. The Act authorized the United States Navy to construct ships and airplanes. That is why it is considered that the greatest impact of the accomplishment of Carl Vinson on World War II was that he wrote two bills expanding naval strength.