Which of the following threat actors is the most likely to be hired by a foreign government to attack critical systems located in other countries?

Organized crime groups are the most likely threat actors to be hired by foreign governments for cyberattacks against critical systems. These groups often possess sophisticated technical capabilities, a hierarchical structure, and a profit motive that aligns with state-sponsored objectives, especially when financial gain or geopolitical disruption is desired. They can operate with a degree of deniability for the hiring government. Hacktivists are primarily motivated by political or social causes, not typically by direct payment from a government to attack critical infrastructure. Whistleblowers expose wrongdoing from within an organization, which is a different type of threat entirely. Unskilled attackers lack the advanced capabilities required to successfully target and compromise critical national systems.