detect which of the choices is selected
convert selection index into actual selection [text]
selection is updated in the inactive state. TODO: somehow show the selection even when in the active state (without going upwards / towards negative y, because we would be overlapping with the other button, which we can't handle right now).
showing the selection even in the active state.

The current way that selections are displayed is a little unusual (because we can't go "up" on the screen for now), but it works.