You may have read too fast my previous message, you have to set the T/A and conditions on the 3 buttons.
By setting this on A, B and C, you will trigger List of actions #1 when the 3 Toggle buttons are checked all together.
Don’t forget you can copy/paste Triggers and Actions, or just Actions.
If you don’t know or remember how, I strongly recommend you to have a look at Intuiface Academy that has been launched this week! 
Among the courses, there is one called “Guidelines and Best Practices” that will teach you this. Don’t hesitate to give it a try, it’s free!