I'm looking for the coding used to cause a radio button selection to enable a shortlist of checkbox inputs. Conversely, if the radio option not related to the checkboxes is selected, they are grayed out (example below). I thought this would be easy to research, but can't seem to find this subject discussed anywhere.
I'm sure the answer is simple. If anyone could help me out I would really appreciate it.
Example:
O I don't know what my goals are
O I know what my goals are
□ Go faster
□ Get bigger
□ Be stronger
Thanks in advance.