d) Great Britain

Great Britain was the first country to receive U.S. aid under the Lend-Lease Act in World War II. This act, passed in 1941, allowed the U.S. to supply military aid to foreign nations during the war with the understanding that it would be paid back in kind after the war. The aid to Britain, which was standing alone against Nazi Germany at the time, signified a strong shift in U.S. policy from isolationism towards active involvement in the war, albeit indirectly at first.