Radio button in Excell workbook

what do you mean delete the selection in the radio button ? delete the button itself ?
not clear.
Can you post the workbook ?
gowflow

Sorry, not delete the radio buttons, but not select any of the selections.  When users open the workbook, I don't want them to see any of selection has been checked in any radio buttons.  Hope this is clear.  If not, let me know.

I attach the workbook here.  For Security Exposures radio box(B30-F31), currently Middle Third is selected because I'm doing testing.  Now I want to send this workbook to users, so I want to un-select Middle Third.  But it seems the only way to un-select Middle Third is selecting another one (such as Higher Third ot Lower Third).  But I don't want anyone is selected when users open this workbook.  Thanks in advance.
CAG-WC-KE-02172014-01202014.xlsm

Thanks.