Final answer:
Cyber activism is the term that refers to politically or socially motivated hacking. It's intended to promote or obstruct change, distinct from cyber espionage, cyber warfare, or cyber crime.
Step-by-step explanation:
The category of cyberterrorism that focuses on hacking computer systems for politically or socially motivated purposes is C) Cyber activism. This form of cyberterrorism is often associated with individuals or groups that use online tactics to promote their political agendas, enact social change, or highlight social issues. These activities can range from organizing protests to hacking into government websites to draw attention to a cause. Unlike cyber espionage, which is the act of governments or organizations spying on one another to gain intelligence, cyber activism is more about promoting or obstructing social or political change. Cyber warfare refers to state-sponsored attacks on another country's systems, which can include sabotage and espionage. Lastly, cyber crime encompasses any criminal activities carried out using computers and the internet, such as identity theft, financial fraud, and malware creation.