Change numbered answers to lettered answers

I have been trying to find a way to change the numbered answers to lettered ones. I managed to find the following span tag that contains the number variable located in the “lib/view/WpProQuiz_View_FrontQuiz.php” file :

<span <?php echo $this->quiz->isNumberedAnswer() ? ” : ‘style=”display:none;”‘?>></span>

Should I replace “isNumberedAnswer” with another function that displays an ABCDE sequence? How would I do this?

Thank you for any assistance or direction you can give me! Your time is much appreciated!!