Final answer:
The psychological strategy student nurses should use is A. Stopping negative self-talk, as it boosts confidence and focus, which are key to successful test-taking.
Step-by-step explanation:
The psychological strategy that a student nurse can use to promote successful test-taking is A. Stopping negative self-talk. Engaging in positive thinking and ceasing any negative thoughts about one's abilities can lead to higher confidence and better focus during exams. Good study habits, managing stress, and relaxation techniques are crucial for mental preparedness. While other options like getting enough sleep (C) and doing exercise (D) are beneficial for overall well-being, they are not psychological strategies but rather physical preparations, and eating a low carbohydrate meal (B) could lead to lack of energy, which is not advisable before a test.
Additionally, it is important to get a good night's sleep and to relax during the test to ensure a clear, focused mind. Understanding that negative self-talk can erode confidence and concentration is a key aspect of promoting successful test performance and is part of fostering a healthier mindset towards examinations.