It sounds like Nick is suffering from a infection of some sort. The name of this infection he may be suffering from is onychomycosis.
I believe it is C because more time is more experience
Answer:
Precertification
Explanation:
For managed care organizations to pay for medical services, precertification needs to be done. Precertification involves proving to the medical insurance company that a service is medically necessary. After precertification, the insurance company would determine if the service is a covered service before payment is made.
Precertification is taken by the insurer to provide the insurance company with procedures and/or services and diagnosis.