How do you make a choice only available if you have previously made a choice.

I’m making a horror kind of game and I don’t know how I can do a script.
Basically, you will get a choice early in the game to fix a phone fuse. Later on in the game, when the killer is coming, I want to make it so you can call the cops, but only if you previously made the choice to fix the phone.
Help, please!

Please see Master List: Links for Beginners for basic help with choices.