Technician a Says That Any J1939 Data Bus Can Be

Technician A says that any J1939 data bus can be accessed by connecting through a green 9-pin Deutsch connector. Technician B says that a J1939 data bus backbone can be accessed through a 3-pin Deutsch connector. Who is correct?

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