Which refueling method allows for more fuel in the wing tanks?

The correct choice is the method that involves over-the-wing gravity refueling. This method allows for more fuel to be added to the wing tanks compared to other refueling options. When using gravity refueling, the fuel is poured directly into the tanks through an opening located at the top of the wing. This method eliminates the need for pressure systems, which may limit the maximum fill due to safety protocols and the design of the fuel system.

In contrast, single point pressure refueling is designed to fill the tanks using a pressurized system that can be more controlled but typically results in a lower maximum capacity for wing tanks. This could be due to design considerations in preventing overflow or damage to the system.

Aerial refueling, while effective for extending flight range, does not focus on maximum capacity of the wing tanks. Instead, it aims to provide in-flight fuel to aircraft that may not have enough fuel to complete a mission, usually with specific limits to what can be transferred in a short amount of time.

Therefore, over-the-wing gravity refueling is advantageous when seeking to maximize the fuel load in the wing tanks.