Technician a Says Lead and Lag Are the Areas on the Panel

Technician A says lead and lag are the areas on the panel where the painter pulls and releases the trigger sometimes too early and others too late. Technician B says when reverse blending the first coat covers te largerst area and the second and third each cover a smaller area respectively. Who is correct?

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