He wakes a short time later and decides to check on the boy.
Heading to the sacrifice area as fast as he can, Benny sees his fears come true, the child is next to be sacrificed..
Benny asks why the child is there, hoping it's some sort of misunderstanding.
Option 1 is unthinkable, option 2 is useless (Benny probably couldn't overpower the child, much less anyone else there), and option 4 would be as useful as option 2. Benny offers to have himself sacrificed instead.
The boy is released and hands Benny his doll, and Benny oddly enough, grows a third arm out of his back to reach it (this is not a glitch).
So much for AM's plan to watch Benny drift further away from his humanity.