Technician a Says That a Common Cause of Top End

Multiple Choice

Technician A says that a common cause of top end clatter in a diesel engine is loose set cylinder valves. Technician B says that loose set valves are subject to lower shock loads on opening and closing because they travel less distance. Who is correct?

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