The authority and prestige of the papacy reached its height under Innocent III, partly because he a. was able to win in specific
conflicts with the kings of England and France. b. separated the church from secular affairs, thereby avoiding embarrassing political confrontations. c. sponsored the Fourth Crusade, which was the most successful of all wars against the Muslims. d. allowed greater diversity of practices and beliefs among Christians in Europe.
Although the principles of separation of church and state along with freedom of the press were advocated by many different Enlightenment philosophers, perhaps the most famous was John Locke.