Context: So we ran back , and then started walking again when we were near the entrance and the mosquitos lessened . We talked and watched the lake next to us . A train went by to our other side , slightly obscured by the trees , and we waved as it passed .
Question: Why did they run back ?
Option 0: None of the above choices .
Option 1: So they could leave the park .
Option 2: To get away from the mosquitos .
Option 3: To catch up with the train .
Answer: 2