The correct response is:
B - were designed to supply Great Britain and other Allied nations with war materiel.
The "Cash and Carry" policy was implemented to allow the Allies to purchase arms and supplies from the United States as long as they could pay cash and transport the materials themselves. The "Lend-Lease" program further expanded U.S. support by allowing the transfer of military equipment and supplies to Allied nations, particularly Great Britain, to help them fight against Axis Powers during World War II.