Read the following context and choose the best option to answer the question.
Context: Hers was the hardest for me even though she was an old lady of thirteen , because it was an accident , and I feel I could have , should have , saved her , if I had only checked on her earlier . Somehow her hind legs had slipped off the back deck , under the chicken wire fencing . Her hips were weak , and she could n't pull herself up . And that 's how I found her , just hanging there .
Question: Why was she an old lady of 13 ?
Options: 
- None of the above choices .
 - She was a pet and pets die at about 13 years old .
 - She was diseased and was a young girl but was ill .
 - She had progeria .


She was a pet and pets die at about 13 years old .