How has terror been used in history?

Yes terrorism has been used in history.

Explanation:

Terrorism is not legally defined in all jurisdictions; the statutes that do exist, however, generally share some common elements. Terrorism involves the use or threat of violence and seeks to create fear, not just within the direct victims but among a wide audience. The degree to which it relies on fear distinguishes terrorism from both conventional and guerrilla warfare. Although conventional military forces invariably engage in psychological warfare against the enemy, their principal means of victory is strength of arms. Similarly, guerrilla forces, which often rely on acts of terror and other forms of propaganda, aim at military victory and occasionally succeed (e.g., the Viet Cong in Vietnam and the Khmer Rouge in Cambodia). Terrorism proper is thus the calculated use of violence to generate fear, and thereby to achieve political goals, when direct military victory is not possible. This has led some social scientists to refer to guerrilla warfare as the “weapon of the weak” and terrorism as the “weapon of the weakest.”

Hope this helps!!

the correct answwer is d