If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）<br>A:a low level in the engine expansion tank<br>B:excessively high coolant pressure<br>C:improper temperatures<br>D:malfunctioning of the jacket water heater

If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）
A:a low level in the engine expansion tank
B:excessively high coolant pressure
C:improper temperatures
D:malfunctioning of the jacket water heater

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