Final answer:
A computer becomes a zombie when it is infected by malware. Malware can give unauthorized access to a computer and control it remotely. Therefore , the correct answer options is a)
Step-by-step explanation:
A computer becomes a zombie when it is infected by malware. Malware is a type of software that is designed to gain unauthorized access to or cause harm to a computer system. When a computer is infected with malware, it can be controlled by a remote attacker and used to carry out malicious activities without the knowledge or consent of the owner.
An example of malware that can turn a computer into a zombie is a botnet. A botnet is a network of infected computers that are under the control of a single entity, often a hacker. The infected computers, or zombies, can be used to carry out various activities, such as launching distributed denial-of-service (DDoS) attacks or sending spam emails.
To protect against becoming a zombie, it is important to regularly update and run antivirus software, avoid clicking on suspicious links or downloading files from unknown sources, and practice safe browsing habits.