Choosing to engage in military action to assist another country is an example of
sanctions
internationalism
isolationism.
diplomacy

The correct answer is C) internationalism.

Choosing to engage in military action to assist another country is an example of internationalism.

In politics, we understand the term internationalism as the cooperation between nations in order to help each other in different circumstances. In this case, one country decides to support others with military support. That is why nations forms alliances, to offer cooperation and help each other in difficult situations. For example, the alliances formed in World War II. The Axis, formed by Germany, Japan, and Itay. Or the Allied Forces, formed by France, Russia, Britain, and the United States.