For the Allies to Defeat the Axis Powers in the Second

For the Allies to defeat the Axis Powers in the Second World War, the United States had to

A) take and maintain control over the important oil fields in the Middle East
B) successfully convert major American industries from production of consumer goods to production of military materiel
C) convince America's corporate leaders to finance the retooling of their factories for the production of war materiel
D) solve transportation problems between the United States and Europe