A degraded flight control law will always result in roll execution in:

The correct response to the question about a degraded flight control law leading to roll execution is found in the context of the aircraft's operational modes. In the A320's flight control system, when a scenario arises that triggers a degradation of the flight control law, this will shift the mode of operation to either Alternate Law or other backup systems, rather than maintaining Direct Law.

In Direct Law, the flight control laws directly translate pilot inputs into control surface movement with minimal electronic intervention. This means the aircraft reacts immediately and predictably to the pilot's commands without any degradation. Thus, while roll execution requires some kind of input or control law, it remains consistent and effective in Direct Law operation.

However, when the aircraft experiences a degradation, it transitions to Alternate Law, where the system compensates for certain failures, but the pilot may find a change in how well (or how effectively) they can control variables like roll. In cases where flight control laws are degraded, Abnormal Attitude Law kicks in, which can further complicate control and might limit roll executions significantly. Mechanical backup would involve reverting entirely to manual systems without any electronic assistance, thus further distancing from the concept of executing roll control efficiently.

Given this understanding, the question emphasizes that during a degraded situation