Answer:
b
Step-by-step explanation:
Although he did everything that he was taught, Luther often became discouraged. He realized he disagreed with some of the teachings and practices of the Church. He believed that the Church's practice of selling of indulgences was wrong and harmful.
In 1517, while reading the Bible, Luther became convinced that he must voice his objections to the Church. On October 31, he nailed his Ninety-Five Theses, or reasons for his objections, to the door of the castle church in Wittenberg. This began the Protestant Reformation.