A. Visual Information Resources Under Siege
B. Vital Information Resources Under Stage
C. Vital Information Resources Under Siege
D. Viral Information Resources Under Siege

Solution

C. Vital Information Resources Under Siege

Explanation

<p>The full form of VIRUS is Vital Information Resources Under Siege. It refers to a type of malicious software, or malware, that can damage a computer's data, files, and software.</p><ul><li>This is a backronym (an acronym formed from an existing word).</li><li>Technically, the term virus in computing is inspired by biological viruses — programs that replicate and spread.</li><li>The backronym helps describe what a computer virus does: it attacks and compromises important information.</li></ul>