After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an（）.

A.insufficient fuel supply
B.faulty governor
C.high exhaust back pressure
D.all of the above may cause this problem

A.high lube oil temperature
B.blue smoke
C.the engine to stop
D.piston seizure

A.Take all exhaust temperature reading
B.Check the sump oil level
C.Verify proper lube oil pressure
D.All of the above