I believe the answer is c
It adds bases in only one direction.
Answer:
It is the scientific method of investigation problem-solving used by disease detectives like epidemiologists, laboratory scientists, statisticians, physicians and other health care providers, and public health professionals, to get to the root of health problems and outbreaks in a community.
Explanation:
A person whose body weight is more that 20 percent above the recommended level is categorized as obese.
Hope this helps!
