in rfd it says ask dave about evil stew liek asking him to give magic thign well ti won t have this option i clicked on eevry option for dave and his mother and this is makin me mad !!!!!!!!!!!!!!!!!!!!!!!

Either you forgot to talk to the cook or gypsy in lumbridge, or you haven't actually chosen all of the options. I know when I did that part, I was confused for awhile, until I realized I kept accidentally clicking past the chat options I needed, thinking it was something else.

omfg i tlaked to cook and everyone y wont it show option!

When I got stuck at that part during the quest, I ad a similar problem. I couldn't figure out what to do next, since all the chat conversations were seemingly dead ends. It turned out the problem was that, while talking to evil Dave, I continuously clicked past a screen with chat options, thinking that the screen was filled with his dialogue. Go very slow through the conversation, and look carefully at every screen. If this isn't the problem, then the only advice I can give you is to start the sub-quest over, and pay close attention to the quest guide.