Context: He was barely breathing while she was just struggling to do so . Neither of them heard the sirens from the fast approaching ambulance . Nor did they notice the bystanders as they stared in horror at the scene without shame . The only thing they saw was each other and the love that they had shared .

Question: Why was the ambulance approaching fast ?
Options:
0. Because the bystanders stared in horror .
1. Because they did n't notice the bystanders .
2. None of the above choices .
3. Because none of them heard the sirens .
Answer: 2