public void checkAnswer(string answer, QuestionUIGroup group, QuestionData data)
    {
        int answerInt = 0;

        int.TryParse(answer, out answerInt);

        if (data.getOptionAnswer() == answerInt)
        {
            new TrueAnswerCommand(nextGroup).OnStartExecute();
        }
        else
        {
            new FalseAnswerCommand().OnStartExecute();
        }
    }
 protected override void initializeQuestionTypeObject(QuestionUIGroup group, QuestionData data)
 {
     buttons      = group.GetComponentsInChildren <CommandButton> ();
     questionType = new MultipleChoiceQuestionType(buttons, data.getOptionAnswer(), group.getNextGroup());
 }