Can you use a variable as a value in a condition?

In my course, I want to show one of four text messages based on comparing values in four different variables.


So if

A Var and B Var and C Var are less than D Var, I want to show a message about D.


I set up a SHOW action:


On Show

Show D Message

IF

A Var is less than D Var

B Var is less than D Var

C Var is less than D Var


Even though I could type D Var in the value field, it isn't working. So is there a way to do that, or something like it?

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