The correct answer is C.
An author's credentials can determine a health source's credibility. None of the other options would apply to credibility. When it comes to health, if you want to make sure that what you are researching or reading is authentic and reliable you need to find out whether the author is a professional health expert or not. You can do this by finding out their credentials.
I'd say it's false. People who are physically active are in better shape and probably won't miss school to things like muscle aches or other health-related issues.
Answer: Its C
Explanation: Because HR is human resources and her job is her relation ships with the employer and employees.
Overall health and probability of staying healthy.