Can the submit button be deleted

For the convenience of our learners, my manager would like me to delete the submit button from the multiple choice questions we are using in our movie. He would Captivate to provide feedback immediately after the learner clicks his/her answer in the radio button. Is this possible?

Note that I have tried making the submit button transparent and placing it behind the radio buttons for all answer options. When this is done and an attempt is made to click a radio button, the radio buttons are unavailable and a failure message appears. Apparently, the submit button is over the radio buttons or at least not transparent so that they can be affected.

JazzAl