Final answer:
The United States kept a policy of neutrality at the start of World War II but still supported the Allies through the Lend-Lease Act. Therefore, the correct option is C
Step-by-step explanation:
At the start of World War II, the United States primarily adopted a policy of neutrality while still providing support to the Allied powers. This stance is best encapsulated by the Lend-Lease Act, which allowed the U.S. to supply military aid to nations fighting against the Axis powers without direct military involvement. The correct statement summarizing the United States' policies at the start of World War II is that the United States tried to keep their policies to remain neutral but provided Allied support through the Lend-Lease Act (option c).