Which one of the following statements is true regarding the international legal prohibition of corruption: a)UNCAC has failed to secure the participation of the majority of the world's countries. b)UNCAC has established opposition to corruption as a global norm and made the elimination of corruption a global aspiration. c)UNCAC defines corruption for the member states but does not indicate the types of activities that might represent corrupt behavior. d)UNCAC is the only international legal agreement addressing corruption.