Bonus: What was the significance of the Diet of Worms in 1521? A It marked the beginning of the Czholio Counter-Reformation. B It was the first time the Bible was published in the vernacular. C It was where Luther was declared a heretic (nonconformist) and excommunicated. D It was a meeting to discuss the formation of the Anglican Church (The Church of England).

C. It was where Luther was declared a heretic and excommunicated.<br /><br />The Diet of Worms was a formal assembly of the Holy Roman Empire convened by Emperor Charles V in the city of Worms, Germany. Martin Luther, who had sparked the Reformation with his Ninety-Five Theses challenging the Catholic Church, was summoned to recant his views. He refused and was subsequently declared an outlaw and a heretic. This event solidified the split in the Christian church and is considered a pivotal moment in the Reformation.<br />