It's great that you give people two options for display of help text: to the right or as a mouseover.
I choose to the right because I think many people wouldn't realise that they can mouseover for help. Also, mouseovers are frustrating if you're a keyboard user.
Only problem is, the help text appears to the right of the last response option, rather than to the right of the question. Could you please fix this?
Better still, it would be great if there was a third option to display help text directly /under/ the question, but before the response options.