The temperature difference between the inlet and outlet temperature of the lube oil cooler in the lubricating system for the diesel engine is generally between （）.

A.the starting air distributor
B.the cut-off valve on the air main
C.the main starting valve
D.the air bottle control valve

A.800 KW
B.5120 KW
C.6400 KW
D.4180 KW

A.are interdependent
B.are not interdependent
C.have nothing to do with each other
D.are independent