【单选题】

Using the wet wing concept, all fuel is stored in three tanks, main tank 1, main tank 2, and center tank, which are constructed of the primary wing structurE.

A、Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. Center tanks are made up of the main wing structurE.
B、Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. These three tanks are made up of the main wing structurE.
C、Using the wet wing concept, all fuel is stored in three tanks. These three tanks include main tank 1, main tank 2 and center tank. The primary wing structure consists of main tank 2 and center tank.