You need to set the value for a global variable named RunningTotal to 5 and navigate to the previous screen named MainScreen.

You need to set the value for a global variable named RunningTotal to 5 and navigate to the previous screen named MainScreen.
Which formula should you use?
A. UpdateContext( { RunningTotal: 5 } ); Navigate( MainScreen, ScreenTransition.Cover, RunningTotal );
B. If( Value(TextBox1.Text) >= 0, (Set( RunningTotal, 5); Back();), Color.Green )
C. UpdateContext( { RunningTotal:5 } ); Back()
D. Set( RunningTotal, 5 ); Back();