Technician a Says Electronically Controlled Transmissions Use Electronic Pressure Control

Multiple Choice

Technician A says electronically controlled transmissions use Electronic Pressure Control (EPsolenoids to control shift timing. Technician B says when looking at electronic pressure control solenoids with a digital storage oscilloscope (DSO) ; the voltage pattern would be a square wave. Who is correct?

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