John Calvin was a major advocate of the doctrine of

This option accurately identifies a major change made by Lutherans in contrast to Roman Catholic doctrine. By permitting clergy to marry, Lutheranism emphasized the importance of personal faith and the value of family, breaking away from the traditional expectation of clergy celibacy in Catholicism.

While it is true that the Lutheran Church adopted a different ecclesiastical structure compared to the Catholic Church, this change was not a major reform in practice but rather an administrative adjustment. Many Lutheran denominations still have bishops or similar leadership roles, so it doesn't represent a fundamental shift in practice.

This choice is misleading. Although some Lutherans were involved in uprisings, Luther himself was generally opposed to violent rebellion against authorities and emphasized obedience to secular rulers, making this option more about political context than a change in religious practice.

While Lutherans did advocate for the use of the Bible in vernacular languages, they did not exclusively use the original Hebrew and Greek texts. Luther's translation of the Bible into German made scripture accessible to more people, which was a significant change but not accurately reflected in this option.