Context: I think she is probably in a great deal of pain , as she is sleeping a lot . She also appears frustrated at having to re - learn how to walk , especially when she is sleepy . The vet has been closed since we picked her up Wednesday , so tomorrow we will call and see if she should be on pain medication . She does better when she finally wakes up at walking about , but she 's been sleeping really heavily lately and frequently prefers to go back to sleep to waking up .

Question: What may have caused her to start sleeping a lot ?
Options:
0. She was tired after we picked her up on Wednesday .
1. She was trying to avoid the physical agony .
2. The medication was making her sleep a lot .
3. She was trying to avoid the physical therapy that would let her start walking again .
Answer: 1