Context: I just got back from a grueling family reunion . No , the family was n't the problem . I had volunteered to do all the cooking , and for three days , I was running a little restaurant . I ' m back home now , and just about recovered .

Question: What may be the reason for them being so tired ?
Options:
0. All the chores they had to do .
1. None of the above choices .
2. They did n't get any sleep the night before .
3. All the work they had to do .
Answer: 3