Answer:
B. The oil fields would enable Germany to fuel their air forces, making them harder to defeat.
Step-by-step explanation:
During World War II Nazi Germany was having great success with conquering territories in Europe. Germany did not advance to other continents, but there was concern that the German army would dominate the Arab territory. The conquest of Saudi Arabia would have been crucial for the Germans to secure control over the oil wells and to have free supplies from their air force which could have led them to victory.