Technician a Says in Order to Provide Additional Gear Ratios

Multiple Choice

Technician A says in order to provide additional gear ratios, most transmissions are equipped with more that one planetary gear set. Technician B says that from a single planetary gear set, five forward gear combinations are possible, although some of these combinations are seldom used. Who is correct?

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