单选题A decrease in the flash point of diesel engine lube oil indicates the lube oil has become ().Acontaminated with sludgeBcontaminated with carbonCdiluted with fuel oilDdiluted with water

单选题
A decrease in the flash point of diesel engine lube oil indicates the lube oil has become ().
A

contaminated with sludge

B

contaminated with carbon

C

diluted with fuel oil

D

diluted with water


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