Evaluate the impact of a malfunction in ATP synthase on the proton motive force and ATP production.

The proton motive force would remain the same, but ATP production would increase.

The proton motive force would be unaffected, but ATP production would decrease.

The proton motive force would increase, leading to more ATP production.

The proton motive force would build up, but ATP production would decrease due to the inability to synthesize ATP.