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Ummmmmm......Where is the question?
<span>d. Clean any dust or debris from the air vents in front of the fans.</span>
D I believe. I’m not %100 percent sure.
Answer:
The answer is below
Explanation:
There are cases where the use of a NULL value would be appropriate in a computer programming situation. These cases can be summarily described below:
The first case is in a situation where the value of the attribute of a certain element is known to exist, but the value can not be found
The second case is in a situation where the value of the attribute of a certain element is not known whether it exists or not.
