Answer:
C
Explanation:
Becuase it sets an explanation for the story
The three forbidden things are:
1. It is forbidden to go East.
2.It is forbidden to go to the "Dead Places", unless you're a priest searching for metal.
3. It is forbidden to cross the great river and look at the "Palace of the Gods".
So option B. To go alone is not forbidden.
Hope it helps!
Th answer to the question is c