<span>D is the correct answer. It is important for fitness centre staff to be certified so they can provide safe instruction, and friendly and helpful so the customer would like to return.</span>
Answer:
1. disease involving abnomalities present at birth: congenital
2. arteries that feed the heart: coronary
3. the growth of abnormal cells: cancer
4. when the body is unable to use the hormone insulin: diabetes
Explanation:
What it is. How it can harm people. How dangerous it is. How people get it.
