Explanation:

Introduction:
Cybercrime refers to criminal activities that are committed using computers, the internet, or other digital devices. These crimes can cause harm to individuals, organizations, or even nations. Cybercriminals often exploit vulnerabilities in technology to gain unauthorized access, steal information, or commit fraud.

Plagiarism:
Plagiarism is the act of using someone else's work or ideas without giving proper credit or acknowledgment. While plagiarism is a serious ethical violation and can result in academic or professional consequences, it is not considered a cybercrime. Plagiarism is more of an intellectual property issue rather than a criminal offense.

Phishing:
Phishing is a type of cybercrime that involves tricking individuals into providing sensitive information, such as passwords or credit card numbers, by pretending to be a trustworthy entity. Cybercriminals often use email or fake websites to deceive their victims. Phishing can lead to identity theft, financial loss, and other forms of fraud.

Using licensed software:
Using licensed software refers to using software that has been legally obtained through proper channels, such as purchasing a license or obtaining it from an authorized distributor. Using unlicensed or pirated software, on the other hand, is illegal and considered a cybercrime. Unauthorized use of software violates copyright laws and deprives software developers of their rightful revenue.

Hacking:
Hacking is the act of gaining unauthorized access to computer systems or networks. It involves exploiting vulnerabilities in security measures to bypass controls and gain control over systems or steal sensitive information. Hacking is one of the most common and serious cybercrimes, and it can have severe consequences, including financial loss, privacy invasion, and damage to reputation.

Conclusion:
In conclusion, the correct answer is option 'C' - using licensed software. While using unlicensed or pirated software is considered a cybercrime, using licensed software is legal and does not fall under the category of cybercrime. It is important to respect intellectual property rights and use software in compliance with licensing agreements to avoid engaging in illegal activities.