Which one of the following is the definition of International Law given by Brierly?

International Law consists of certain rules of conduct which modern civilized States regard as binding on them in their relations with one another.

The Law of Nations or International Law may be defined as the body of rules and principles of action which are binding upon civilized States in their relations with one another

By the Law of Nations or International Law, should be understood the sum of rules of conduct by various nations in their relations with one another

International Law or the law of Nations is the name of a body of rules which according to the usual definition regulate the conduct of the States in their intercourse with one another