The caravan leader collects everyone's weapons because the tribesmen fought in the desert, leaving the oasis as a place of refuge
According to the book The Alchemist, the caravan leader takes his group to an oasis where they could stay until the fighting stops and they are able to go out.
Basically, the oasis is a place of refuge where people can hide out until the violence outside stops.
Therefore, when they arrived at the oasis, the leader collects their weapons because it is not allowed in the oasis.
This is because the only fighting that is done will be done outside in the desert and not in the oasis
The correct answer is option D
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