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 .
According to the above context, choose the best option to answer the following question.
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 .