When used in conjunction with a turbocharger, the main function of an after－cooler is to _

When used in conjunction with a turbocharger, the main function of an after-cooler is to ______.

A.increase the density of the cylinder air charge

B.prevent turbocharger overheating

C.liminate the need for a pre-cooler

D.remove moisture from air compressed by the turbocharger

请帮忙给出正确答案和分析，谢谢！

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