When the electric pump operates the FWD and AFT cargo doors, which other items can operate in the yellow system?

The correct choice highlights the functionality of the yellow hydraulic system on the A320, which is essential for understanding the aircraft's hydraulic system operations. The yellow system not only powers the cargo doors via the electric pump but is also responsible for operating key components such as the braking system and the reverse thrust of Engine 2.

In detail, the braking system's operation is crucial for landing and stopping the aircraft safely, while the reverse thrust capability of Engine 2 allows for effective deceleration during the landing rollout. This integration of operations within the yellow hydraulic system maximizes safety and efficiency, particularly in scenarios where other systems may be impaired, allowing critical operations to continue functioning.

The other choices, while containing elements that are important in aircraft operation, do not encompass the specific items that are active along with the operation of the cargo doors in the yellow system. For instance, the flaps and spoilers primarily rely on the green hydraulic system, while the landing gear operates through both the green and yellow systems, and the elevators and ailerons depend on the flight control systems which primarily function with the green system. Therefore, option B accurately identifies the additional items that can operate using the yellow hydraulic system in conjunction with the electric pump for the cargo doors.