. Because the town in which Serena lives is close to an international border, she has already worked with clients who are citizens of Mexico. Serena discusses the concepts of national and international law with the students. Which of the following statements about international law is not true? a. International law can be defined as the body of written laws that have been ratified by the United Nations. b. Generally speaking, there are two types of legal systems used by the various countries of the world: common law and code law. c. Judges in a civil law system are not obliged to follow precedent, and thus the doctrine of stare decisis does not apply. d. The state of Louisiana has, in part, a civil law system