Fuels of high quality with their earlier ignitions will cause higher （）pressure in cylinders of a diesel engine.

A.the viscosity index
B.the fuel oil contents
C.the starting speed
D.the reading at the rack

A.have nothing to do with
B.having nothing to do with
C.have much to do with
D.having much to do with

A.a transfer pump
B.a bilge pump
C.a service pump
D.a vacuum pump