Two Technicians Are Describing How to Inspect an EGR Cooler

Multiple Choice

Two technicians are describing how to inspect an EGR cooler for leaks. Technician A says that you use shop air pressure regulated to 50 psi to pressurize the cooler exhaust ports to check for cracks. Technician B says that after visually inspecting the engine for coolant leaks during a pressure test, the EGR cooler can be disconnected and removed. Who is right?

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