Context: The marathoners were off . The convoy of machine gun - toters was leading the way . I only know this because I stuck my hand in the air to take pictures . I would look down at the exposure and see what was happening .

Question: Why were machine gun - toters leading the way ?
Options:
0. They were providing security .
1. The writer was looking down at the exposure .
2. The marathoners prefer to run behind machine gun - toters .
3. None of the above choices .
Answer: 0