Brake Bleeding ABS Systems Are Being Discussed

Brake bleeding ABS systems are being discussed. Technician A says that Some manufacturers state that either pressure bleeding or manual bleeding is acceptable for their various ABS installations. Others specify either one method or the other . Technician B says Use only the DOT 3, DOT 4, or synthetic brake fluid specified by the vehicle manufacturer . Who is correct?

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