Hi guys

so ive got a form where im trying to let the user select a Division, and then a Category, and then the sub-category.

Each is dependent on the level above it. 

How can i make it so that if the user changes their answer on any of the levels, it hides AND clears the previously selected things. 

What woudl be great if there was a "hide all others" or "clear all others" command. I tried making all the "sub categories" into a collection or list but i couldnt figure out how to then tell it "for each thing in the list, set it to clear or "" "

can provide more info if needed

thanks