Context: When he removed it , he found that he was alone . With some difficulty , he managed to sit up and grabbed the waterskin from his bag , drinking his fill . Something was wrong . He did n't normally sleep this much , even given the opportunity . He usually did n't require much sleep .

Question: What is causing the anxiety of the subject ?
Options:
0. They are slumbering too much .
1. They are   low on drink .
2. They are low on water .
3. None of the above choices .
Answer: 0

Question: What is causing the anxiety of the subject ?
Options:
0. They are low on water .
1. They are getting too many z 's .
2. They are   low on drink .
3. None of the above choices .
Answer: 1