Hades does not believe that the other gods will help him search for the Helm of Darkness, so he doesn't tell any of the other guards that it is missing. Eventually, Percy helps him find the Helm of Darkness that was stolen by Luke, so Hades helps Percy out and returns his mother.
The answer to this problem is B: dialect: sociolect.
Palomar observatory is in California and also Hale telescope is there and it was once the largest telescope in the world.
