Technician a Says That the Units on a Scanner for a Fuel

Technician A says that the units on a scanner for a fuel pressure regulator energized by a PWM signal will be reported in volts and amps of electrical current. Technician B says that the units for a PWM signal may be reported as a percentage or in milliseconds Who is correct?

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