Technician a Says That the First Generation of Diesel Common

Technician A says that the first generation of diesel common rail (CR) systems was introduced on small bore diesel engines. Technician B says that CR fuel systems are unable to produce high enough peak pressures to fuel current large bore diesel engines. Who is correct?

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