The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）<br>A:expansion of the combustion gases<br>B:exhaust and intake valves just closing<br>C:maximum compression is just being attained<br>D:fuel injection occurring at that point and combustion begins

The pressure in an operating diesel engine cylinder continues to rise for a short period after the piston passes top dead center as a result of the （）
A:expansion of the combustion gases
B:exhaust and intake valves just closing
C:maximum compression is just being attained
D:fuel injection occurring at that point and combustion begins

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