While Discussing the Four-Stroke Cycle, Technician a Says That During

Multiple Choice

While discussing the four-stroke cycle, Technician A says that during the intake stroke, the piston is pulled down by the turning crankshaft, creating a vacuum above it. Technician B says this event occurs during the exhaust stroke. Who is right?

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