How to reveal the correct answer after incorrect attempts

Thanks @ashley and @crystal and @marcia.  NOTE - this is for Quizmaker.  

To be 100% clear, i do understand that i can go slide by slide to add feedback - this is not scale-able for the hundreds of questions we want to create.  Many training organizations who educate their customers are moving away from high-stakes certifications that are expensive and unwieldy.  We need tools to build and manage question banks and exams that automate our processes.  I have done my best to create a feature request to represent thist.