Technician a Says VVT (Variable Valve Timing)engines Use a Cam

Multiple Choice

Technician A says VVT (variable valve timing) engines use a cam phaser that advances or retards the camshaft as the engine is running. Technician B says VVT engines use a third cam lobe with increased lift and duration, operating a third rocker arm that is coupled to the two primary rocker arms by a hydraulically controlled pin, while the engine is running. Who is correct?

A) A only
B) B only
C) both A and B
D) neither A nor B