Lee and Victor are good friends. Lee's laptop computer has become very slow and is not working correctly, and he goes to Victor and asks for help. Victor downloads some antimalware software onto Lee's computer, and its performance improves. Victor has provided
A. engagement support.
B. social companionship.
C. informational support.
D. instrumental support.
E. esteem support.
Answer: D
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The ____ can extract a single bit from a bit string
a. logic SHIFT b. ROTATE c. ADD d. NOT
Which of the following best defines an operating system (OS)?
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