Is there a way to make prior responses to a question not display on recurring approaches to a question?

I basically want a learner to be able to attempt a question multiple times without having a popup display (see URL below) and without seeing any of her/his prior choices to the question.

Thanks to Barend for help on removing popups on recurring approaches to questions. See here:

http://www.friendsofcourselab.info/hints/hints_base.html