Final answer:
An act is defined as terrorism when it is dangerous to human life, violates criminal laws, intends to coerce civilians or government, occurs within the U.S., and can be domestic or international.
Step-by-step explanation:
According to the criminal laws of the United States or any State, an act may be defined as terrorism if it fulfills several conditions. These acts must be dangerous to human life, violate criminal laws, and be committed with the intent to intimidate or coerce a civilian population. Among the defining features of domestic terrorism is that the act happens primarily within the territorial jurisdiction of the U.S. and does not involve foreign influence, while international terrorism involves violent activities with foreign groups or governments. Specifically, these acts often seek to influence government policy through intimidation or coercion, or to affect government conduct through methods such as mass destruction, assassination, or kidnapping. Thus, the correct answer that defines an act as terrorism is 4) All of the above.