What occurs when the takeover button on both sidesticks is pushed?

When the takeover button on both sidesticks is pushed, the system is designed to ensure that only one sidestick can provide inputs to the aircraft controls at any given time. In this scenario, the last sidestick activated assumes priority. This means that if two pilots are attempting to take control simultaneously, the input from the pilot who pressed their takeover button last will override the inputs from the other sidestick.

This design feature is critical for ensuring clarity in control inputs, preventing conflicts, and allowing for a seamless transition of control from one pilot to the other. In busy cockpit environments, where clear command of the aircraft is crucial, having a definitive method for determining priority helps maintain safety and operational efficiency. The other options don't reflect this operational protocol, as they suggest either shared control or no control at all, which would not be practical in managing aircraft operations.