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 .
What may be the reason for them being so tired ?
Pick the best answer from the following options:
A. All the chores they had to do .
B. None of the above choices .
C. They did n't get any sleep the night before .
D. All the work they had to do .


D