Context: Crowds of angry , smelly people were bitching and bumping into each other , and into me , trying to get their copy of whatever textbook they needed for whatever stupid class they were taking . One lady asked to herself out loud " Where is 237 ? " when she was looking at the History section of books .

Question: Why may the people have been unhappy ?
Options:
0. It was crowded , hot , and difficult to get their books .
1. They needed to find the history books section to get books .
2. They were trying to return textbooks they needed for their classes .
3. None of the above choices .
Answer: 0