Read the following context and choose the best option to answer the question.
Context: My dog had a heart attack tonight . He died within minutes of mom taking him to the animal emergency room . I was on my way to meet her there . I did n't get there in time .
Question: Why is the narrator likely crying and downtrodden ?
Options: 
- Their mom is dead .
 - None of the above choices .
 - Their pet passed away .
 - Their mom passed away .


Their pet passed away .