controlgroup('refresh') not working

controlgroup('refresh') not working

hello i am having problems using both enhanceWithin() and controgroup('refresh'). i posted a question last month about a similar thing( link ) and i was help but when i try to apply what i understood it just doesnt work.
 Now my problem is i want all the possible answers in the quiz to look like this link2 now this was  how i did it with just one question  but now i want to do multiple questions.