Read the following context and choose the best option to answer the question.
Context: We been wanting to go to the Ma Wan Park for some time but were always full of excuses . After sending my mum to airport today , it was only 9 am . I was sleepy and tired but I did n't want to sleep cos that will make me feel even worse .
Question: Why were they feeling so tired ?
Options: 
A. None of the above choices .
B. They had to wake up early to catch a flight at the airport .
C. They had to wake up early to taking their mum to the airport .
D. They had stayed up too late the night before a flight .


C