Answer :
Final answer:
d. All of these. All the mentioned methods, including correct fan configuration, regular vacuuming of dust, and the use of air conditioners, are all beneficial in keeping a computer cool.
Explanation:
In keeping a computer cool, all the mentioned methods can be helpful. Firstly, it's critical that cooling fans aren't circulating air in the wrong direction as this could potentially increase the system's temperature rather than reduce it. The correct fan configuration is to blow cool air onto heat-generating components and exhaust the hot air out.
Secondly, regular maintenance like vacuuming dust from the system prevents dust accumulation which may block air vents or form insulated layers reducing the cooling efficiency. Lastly, while not commonly used for individual computers, air conditioners can be useful particularly in server rooms or data centers to help maintain an overall low ambient temperature. Air conditioners, like refrigerators, function by transferring heat from a cool environment to a warmer one.
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