Which of the following describes concentration sampling? A. Uses a dynamometer to load the engine to realistic loads B. Captures all of the exhaust and displays each gas as GPM C. Samples only a small...

Which of the following describes concentration sampling?

A. Uses a dynamometer to load the engine to realistic loads

B. Captures all of the exhaust and displays each gas as GPM

C. Samples only a small portion of the total exhaust sample, then displays each gas as either percent or PPM

D. Both A and B