What feature allows candidates to flag questions for future review?

The feature that allows candidates to flag questions for future review is the "Mark for review option." This function is crucial during exams, as it empowers candidates to indicate specific questions they may want to revisit before finalizing their answers. By using this option, a candidate can manage their time effectively, ensuring that they address uncertainties or tricky questions after completing the initial pass through the exam.

The other features mentioned do not provide the same capability. For instance, the "Next button" is typically used to progress to the subsequent question without offering any review functionality. The "Submit Exam button" concludes the exam and submits all answers, eliminating the possibility of revisiting flagged questions. The "Review All button" might allow candidates to go back and view all their answers, but it does not specifically flag questions for re-evaluation. Therefore, the "Mark for review option" is uniquely designed to enhance a candidate's ability to navigate their exam strategy effectively.