The answer is "a". The Edict of Nantes was the first official recognition of religious toleration by a great European country. King Henry IV of France signed the edict in the city of Nantes on April 13, 1598. This came after 50 years of internal warfare in France. The Edict of Nantes allowed the French Protestants, called Huguenots, religious freedom and political equality. But the Edict of Nantes was first annulled by Cardinal Richelieu in 1629, then revoked by King Louis XIV on Oct. 18,1685. As a result about 400,000 French Protestants left France. I hope that this has been a help to you.