Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?（）<br>A:compression must be low for effective spark ignition<br>B:compression must be low for required horsepower and torque generation<br>C:compression must be low to prevent pre-ignition<br>D:compression must be low to have effective pre-ignition

Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?（）
A:compression must be low for effective spark ignition
B:compression must be low for required horsepower and torque generation
C:compression must be low to prevent pre-ignition
D:compression must be low to have effective pre-ignition

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