A. Cutting off all relations with a country is an effective way to show that its actions are unacceptable.
Explanation:
In trade and international politics, an embargo is the prohibition of trading and negotiating with a particular country. It is usually declared by one group of nations against another, in order to isolate it and place its government in a difficult internal situation, since the effects of the embargo often cause its economy to suffer. The embargo is normally used as a political punishment for certain prior policies with which it is not agreed, although its economic nature often leaves enough space to doubt the true interests that benefit from the measure.
