It is an example of managed care. In this, the insurer approval is firstly taken, when an insured person enters any hospital. This manages costs, and the practice is mandatory in some organizations. Pre-authorization is a certificate which determines if the requested treatment is necessary or not.
I think it would be an independent variable, but I learned this last year so I don't remember exactly.
You didn't include the options, but Brazil was one nation that gained independence in 1822.
Answer:
a
Explanation:
the correct answer is A. because a silversmith works with silver and pewter is a type of metal allow
