QCM : Checking wrong answers to get feed back after finding the correct one

[JBTouchard]

Obviously not loosing points ...
The learner fond the correct answer in a QCM.
A modals opens to tell OK.
In the footer, we add "A présent, tu peux regarder les commentaires sur les mauvaises réponses de cet exercice sans perdre de points."
... and obviousy code the behaviour accordingly.