UniOil, a U$.$S$.$ firm, owns property in Venezuela. When the government of Venezuela seizes the property, UniOil asks U$.$S$.$ court to order the property's return. The court rules that Venezuela is exempt from the court's jurisdiction. This i example of which principle of international law:

a travesty of justice.

the act of juris excludis rexius doctrine

the doctrine of sovereign immunity.

the principle of comity.