What is a fee-for-service system?

Fee-for-service is a system of health insurance payment in which a doctor or other health care provider is paid a fee for each particular service rendered, essentially rewarding medical providers for volume and quantity of services provided, regardless of the outcome.

Explanation: that is the exact definition

absolute strength refers to the maximum force exerted by a body irrespective of body size. relative strength on the other hand is the force exerted by a body in relation to muscle size or body weight.

so the answer is: c. absolute strength measures strength regardless of your body size, while relative strength measures strength adjusted for your weight.