B. One of your troop members began to cry.
It doesn't explain why he is crying, and is the most suspenseful, but one could argue it was C, because they could have going the wrong direction, but B is the most suspenseful due to the crying and emotion in it.
Hope this helps, even though I just debated aloud.
It must be C because if Pony told Randy that he had the knife and killed someone, that could lead to serious consequences that lead to the climax.
