Complete the tour guide's frantic warning to the curious museum visitor. Select the grammatically correct phrase.

Whatever you do, ___ that shiny red button!

The correct answer is don't press.

To form a negative command or warning, we use Do not (or the contraction Don't) followed by the base form of the verb. "Not press" is missing the auxiliary verb "do", and "doesn't" is only used for third-person singular subjects in the indicative mood, not imperatives!