Final answer:
The correct answer is option D:The most likely cause of a whining noise when the steering wheel is turned is that the power steering is low on fluid, which can put the system under stress and result in noise.
Step-by-step explanation:
The power steering is low on fluid. When a vehicle emits a whining noise during steering, it often indicates that the power steering system is either low on fluid or there is air trapped in the system. The power steering system relies on hydraulic pressure to make steering easier, and if the fluid level is low, the pump may start to cavitate, causing a whining noise. Lack of proper lubrication and cooling from the fluid can lead to increased wear and potential damage to the power steering pump and other components. It is less likely that the noise is related to the alternator or its belt unless the sound persists without turning the steering wheel. It's important to check the power steering fluid and address any leaks or fluid issues to prevent further problems.
One common cause is a loose or broken power steering belt. The power steering belt connects the engine to the power steering pump, which helps turn the wheels.
When the power steering belt is loose or comes off, it can cause the power steering pump to not function properly, resulting in a whining noise when turning the wheel. This can also lead to difficulty in steering and a heavier steering feel.