Hiding the "Show Correctness" button in card sort

There seems to be a new feature in the card sort that has a button in the top center that, when clicked, puts a checkmark on all of the correctly matched cards. I feel it reveals too much for the students. Is there a way to hide the “Show Correctness” button in a card sort.

I figured it out. The “Show Correctness” button only appears when you “preview” but once you publish it and do the “student preview” the button is no longer there.