Which word or phrase is a synonym for the word doctrine? a group of friends or family moral judgment attitude a declaration or set of rules

Doctrine in dictionary is a set of ideas and beliefs taught to people that are believed to be true. In the choices above, the one that best fits the definition would be ‘declaration or set of rules’. Doctrines are indeed a set of rules declared by a governing body to certain population that must be instilled, respected and obeyed. These rules are studied historically over the years of experiences and wrongdoings and is applicable to everyone under the jurisdiction of a certain government or state or area.