Diane's heart felt leaden as she prepared to leave. Each face she looked at, she knew she was seeing for the last time. As if she were dying and they all were going to live on. Oh, why must I leave? Now, when all of you are about to put on the martyr's crown, how can you cast me out? I want to die with you. I do not want to go on, stumbling through this world alone. For years these people had been her only family. When she was a child, her faith was preached and practiced openly all over the south of France. The crusade was already twenty years old then, but the perfecti still taught crowds of people in the streets of great cities like Toulouse and Beziers, still won converts away from the Church of Rome. From the lords and ladies in their castles to the peasants on the mountainsides, over half the people were Cathars. Now this year, one thousand two hundred forty-four, might come to be remembered as the year Catharism in France disappeared. From now on there would be nothing but a remnant in hiding, having to sneak about. No, she didn't want to live that way. She longed to throw herself down and beg Bishop Bertran once again to let her stay. But duty pressed down upon her like a mail shirt. It was burdensome, but it protected her from error. She quietly made ready. Before long, Diane and Roland were standing on the northeast wall amid a group of perfecti. From a family that had taken refuge on Mont Segur had come a red and green costume for Diane, the tunic and hose of a well-to-do boy, an equerry. They had cut her hair short and tucked it under a cap topped with a long partridge feather. They had sewn the red cross back on Roland's black surcoat, and had made one for Diane's tunic from a gentlewoman's crimson scarf. A rope to form a sling was tied around her waist and another around her knees. Roland was similarly tied. According to the above context, choose the correct option to answer the following question. Question: Diane believes that: Options: A. not enough information B. it was calling to stay C. it was her duty to leave her people behind D. it is time start Catharism in France
The answer to this question is:
C