What is the term given to the process of breaking up fuel oil into very fine particles for better combustion?（）

A.misfiring
B.pre-ignition
C.interrupted scavenging
D.reduced scavenging

A.leaking exhaust valves
B.an overloaded cylinder
C.a clogged injector nozzle
D.all of the above

A.lube oil pump suction line
B.lube oil pump discharge line
C.bottom of the lube oil sump
D.outlet from the lube oil header