Final answer:
The medical assistant should report the incident to the instructor.
Step-by-step explanation:
The medical assistant (MA) should report the incident to the instructor as the correct action to take if they observe a clinical student caring for 2 patients using the same gloves. This is because using the same gloves for multiple patients can lead to the spread of infections and cross-contamination. It is important to emphasize proper infection control and hygiene practices in the healthcare setting, and the instructor can address the issue with the student and provide appropriate guidance.