Correct option is A
“Malware” is an umbrella term for any kind of malicious software designed to harm, exploit, or otherwise compromise a computer system or network. Common examples include viruses, worms, ransomware, spyware, and trojans.
Typically, such programs infiltrate a system via downloads, suspicious links, or removable media. Once installed, malware can steal sensitive information, disrupt normal operations, or lock users out of their data (as seen in ransomware).
Other terms, such as “server,” “LAN” (Local Area Network), and “operating system,” are not inherently harmful or malicious: they are either hardware/software roles or structures used for legitimate computing tasks.
