Context: We also saw horses ... and almost hit a deer . We tried to get Holly to watch the Demitri Martin CD , but she fell asleep . Instead , we all packed up and gave in to slumber . In the morning , we got up early , and drove back out to Assateague . There were n't too many people on the beach .

Question: Why might Holly have fallen asleep before anyone else ?
Options:
0. Holly did n't like the Dean Martin CD and opted for slumber instead .
1. They got up early and went to Assateague so she did n't sleep well the night before .
2. None of the above choices .
3. She was not used to so much fresh air and it made her feel sleepy .
Answer: 3