Final answer:
Guidelines for administering tests to athletes include explaining why the tests are being given and providing specific feedback on the test results.
Step-by-step explanation:
When administering tests to athletes, certain guidelines are essential to ensure the process is effective and beneficial for the athletes. First, it is important to explain to athletes why the tests are being given so that they understand the purpose and importance of the testing, leading to better cooperation and more accurate results. Secondly, while giving clinical as well as sport-specific tests may provide a comprehensive evaluation, this option is not mentioned within the context of this question. Lastly, provide specific feedback concerning test results is crucial as it allows athletes to understand their performance and areas of improvement. Thereby, the correct answer would be 4) a and c, which encompasses both explaining the purpose of the tests and providing specific feedback on the results.