Critical Reasoning

General: The commander of the Air Force has recommended that we deploy the G28 aircraft in the reconnaissance mission, because the G28 can fly lower to the ground without being detected and could therefore retrieve the necessary information more efficiently than the currently stationed D12. But the D12 is already in the area and poised for takeoff, and would have just enough time to accomplish the mission if deployed immediately, while the G28 would require four days just to arrive in the area and get outfitted for the mission. Since the mission's deadline is immovable, I am forced to overrule the commander's recommendation and order the deployment of the D12.
Which of the following is assumed in the general's argument?
(A) The quality of information retrieved from the mission would be higher if the D12 were deployed than if the G28 were deployed.
(B) By the time the G28 arrived in the area and was outfitted for the mission, the D12 would have already completed the mission if deployed immediately.
(C) The ability of an aircraft to fly low to the ground is not a significant consideration when choosing aircraft for a reconnaissance mission.
(D) It would take longer for any aircraft not currently in the area besides the G28 to arrive in the area and get outfitted for the mission.
(E) Any time saved during the mission due to the operation of the more efficient G28 would not offset the additional time required to deploy the G28.

Please hep me undestand this one in details

Regards,
Phil