Operating a diesel engine under light loads and at low temperatures for an exhaust for an extended period can result in（）<br>A:formation of carbon on the intake and exhaust ports<br>B:high water jacket temperatures<br>C:overheated pistons and cylinders<br>D:an increase in lube oil viscosity due to fuel dilution

Operating a diesel engine under light loads and at low temperatures for an exhaust for an extended period can result in（）
A:formation of carbon on the intake and exhaust ports
B:high water jacket temperatures
C:overheated pistons and cylinders
D:an increase in lube oil viscosity due to fuel dilution

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