Technician a Says That a CR Engine Can Vary the Injection

Technician A says that a CR engine can vary the injection pressure, timing, and injection rate shape for each injector. Technician B says that the injection pressure is the same for all injectors in CR engines, and injectors can perform multiple injection events during each combustion cycle. Who is correct?

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