Answer:
B. North Africa
Step-by-step explanation:
The US entered the war as an ally to Britain and France with Operation Torch , a major offensive in a series of struggles to control the Suez Cannal and access pointos to oil from the Middle East coming from Asia.
The oil became a strategic resource since modern armies demanded high amounts of it to mobilize.
The allied forces reduces the presence of the Axis in Egypt, and enabled a landing of troops into Southern Europe, as a second frontline which the USSR so long had been requesting since invasion by Germany with Operation Barbarossa took place-
As such Operation Torch was the first mass involvement of US troops in the European–North African dispute, witnessing a major US air strike carried in cooperation with the Royal airforce.