In my opinion, I think it is A.
Hope helps-Aparri
During the Alaskan Gold Rush thousands of mostly nameless<span> men sought their fortune in a harsh environment and lost</span>
The reason why the boy's father doesn't tell the boy to leave is : C. The father is unconsciousI think it's pretty much self-explanatory. No father will let danger come to his son if he can help it
I’d say común and popular