A.Adaptercards（e.g.modems）donotaddtotheheatgeneratedinacomputercase.
B.Busmasteringreducestheamountofheatgeneratedinsideacomputercase.
C.Removingexpansionslotcoverscancompromisecoolingairflowdesign.
D.Periodiccleaningofthecomputercomponentsinsidethecasehasnoeffectoncoolingefficiency.
参考答案：C
