What is one effect of running a diesel engine at too cool a temperature? （）<br>A:Buildup of sludge in the lubricating system<br>B:Excessive fuel consumption<br>C:Severe heat stresses on mechanical parts<br>D:Foaming of the lubricating oil

What is one effect of running a diesel engine at too cool a temperature? （）
A:Buildup of sludge in the lubricating system
B:Excessive fuel consumption
C:Severe heat stresses on mechanical parts
D:Foaming of the lubricating oil

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