Which event from Barrio Boy best supports the idea that Ernesto was expected to follow rules and be honest?

Ernesto is appointed as the "man of the family" until they reach Sacramento.
After removing a brass knob from the bedpost, Ernesto is ordered to put it back.
Ernesto learns that he can create lightning by quickly turning the light switch on and off.
After discovering how the toilet works, Ernesto gets up several times in the night to flush it.