Tick feature that only returns one tick as the answer - what to do if more than one tick selected?

I am creating a survey and want only one tick selected as the answer.
Does anyone know the logic to tell AppGyver to only return the answer for one tick?
Here is the current logic for one tick shown in image.
It gives an answer whenever a tick is changed not ideal!

Some resources to check before you post:

AppGyver Academy: SAP AppGyver Quick-Start

Troubleshooting FAQ: SAP AppGyver FAQ

You need a variable for each option, then just use logic to set all of the other ones back to blank when another one changes.