When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）<br>A:the amount of lube oil additives increase<br>B:piston speeds increase<br>C:injection pressure decrease<br>D:engine speeds decrease

When comparing different fuels for different engines, the ignition quality of diesel fuel oils becomes a less critical consideration as （）
A:the amount of lube oil additives increase
B:piston speeds increase
C:injection pressure decrease
D:engine speeds decrease

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