By default, the platform does not have this option. You can use the following CSS code to highlight the correct answer on LearnDash quizzes.

Please follow the steps below:

1. Go to BuddyBoss > Theme Options

2. Under Custom Codes, enable CSS

3. Append the following:

.learndash-wrapper .wpProQuiz_content .wpProQuiz_questionListItem.wpProQuiz_answerCorrectIncomplete {
border: 1px solid green !important;
}

4. Save changes 

Note: Any modifications are considered as custom work already. Know more about our Support policy here: https://www.buddyboss.com/support-policy/