With todays quiz, my selection (which I won't say what it was), after selecting it and clicking review, it said NO ANSWER, so I wanted to go back to the question thinking that somehow I made a mistake. Seeing no 'go back to the question' type of button I hit BACK, thinking it would just take me back and the timer would still be counting down and all should be fine, but it locked me out, and now shows as not completed. Reviewing before submitting your answer is kind of pointless if you can't go back to the question to double check or even reconsider another answer if you wanted to.