What should be done to any mistakes on the exam script?

The correct response focuses on the importance of addressing mistakes in a way that is acceptable in exam environments. Using "rubbered out" indicates that mistakes can be erased or corrected, which aligns with common practices in managing errors on exam scripts. This approach allows the examiner to clearly see changes or corrections made by the student, maintaining the integrity of the script while ensuring that errors are not left unaddressed.

This method also promotes clarity and helps prevent confusion for anyone reviewing the exam later. By allowing for revisions, it encourages students to strive for accuracy and learn from their mistakes rather than perpetuating them. The phrasing in the other options does not convey appropriate actions for addressing mistakes; therefore, they are less suitable in the context of handling errors effectively during exams.