Concept:McAfee and Avast are security programs designed to protect computers from malicious software.
Explanation:Antivirus software is also known as anti-malware.
It is used to prevent, detect, and remove malware such as viruses and spyware.
Common examples include McAfee, Avast, and Quick Heal.
Library software is used to manage library functions like cataloging and issuing books.
Library software examples include CodeAchi and Libero, which are unrelated to McAfee and Avast.
Therefore, McAfee and Avast belong to the antivirus category.
Answer:Option D - Antivirus.