Final answer:
Martin Luther, a German Catholic monk, launched a protest against the Roman Catholic Church which led to the Protestant Reformation. He objected to various practices of the church, such as the sale of indulgences, the taxation of ordinary Germans, and the delivery of Mass in Latin.
Step-by-step explanation:
Martin Luther, a German Catholic monk, launched a protest against the Roman Catholic Church which led to the Protestant Reformation. He objected to various practices of the church, such as the sale of indulgences, the taxation of ordinary Germans, and the delivery of Mass in Latin. While Luther encouraged others to get married, he himself refused to marry.