I am using Acrobat Standard 9 to create a form for clients to fill out. A couple of the items are radio buttons with nested sub-options. For example, one question has seven mutually exclusive options. Option 7 however, if selected, should present two mutually exclusive sub-options. Right now, the user can choose Option 1, and still choose an Option 7 sub-option. However, this should not be the case. If option 1 is chosen, those option 7 sub-options should not be disabled, and cleared out if already selected.
How do I accomplish this? I have similar issues with check boxes, but assume the answer to the above will work for that as well.