While Having a Discussion, Technician a Says That the Length

While having a discussion, Technician A says that the length of time required for ignition coil primary winding saturation varies with engine speed. At low engine rpm, dwell is longer. Technician B says that at low engine rpm, there is more time between cylinder firings than at high speeds, so dwell time can be shorter. Who is correct?

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