While Having a Discussion, Technician a Says That BMW's Active

While having a discussion, Technician A says that BMW's active steering system uses a planetary gearset between the steering wheel and the steering gear. The input is the planetary carrier and the output is the sun gear. Technician B says that the input is the sun gear and the output is the planetary carrier. Who is correct?

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