Technician a Says That the Best Approach to Determining If

Technician A says that the best approach to determining if a noise is a wheel bearing is to drive the vehicle at the speed at which it occurs and then lightly rock the car side to side using the steering wheel. If the noise changes, it is likely a wheel bearing problem. Technician B says that the best approach to determining if a noise is a wheel bearing or tire is to drive over different road surfaces such as asphalt and concrete. If the noise does not change, it is likely a tire problem. Who is correct?

A) Technician A
B) Technician B
C) Both Technician A and Technician B
D) Neither Technician A nor Technician B