Has graphic designing been positive or negative explain

What type of file does a cookie place on web site visitors' computers so that web site managers can customize their sites to their visitors' preferences?

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Technician a says that a new replacement part is always good. technician b says that sometimes recent repair work will be the cause of a complaint. who is correct? a. both technicians a and b b. technician a c. technician b d. neither technician a nor b