Context: When I was younger , I was friends with a youth worker . He went on a backpacking trip and never came back . His base camp was found , but he was never found or seen again . There was no indication of a struggle , violence , animal attack , etc .

Question: What may of happened to him ?
Options:
0. None of the above choices .
1. He got lost .
2. He got married .
3. He ran away .
Answer: 1