Read the following context and choose the best option to answer the question.
Context: So Mike told the kids that they were going to be on their own for a few hours . I went back to my hotel to change into evening clothes but ended up reading Steve Brust 's Jheggala and then back to the Sheraton at close to midnight . I ended up hanging out a bit at the Australia Victory party in the basement which closed around 1AM and then back up to the Reno in 2011 party which was not as entertaining as the previous evening . I went back to the Hotel by something like 4:30 .
Question: Why will the narrator be tired the next morning ?
Options: 
A. Their kids kept them up .
B. They partied late .
C. They could n't find the Sheraton .
D. The Canadian Victory party kept them up .


B