Maria should answer the phone call with Health Medical Center, how can I help you?. The correct option is a.
A health medical center is where people with injuries, disease, or any medical condition come to have checkups and treatments. These are hospitals and clinics.
The person who first registers the patient is the receptionist, Maria, she should answer with how can she help the patients.
Thus, option (a.) Health Medical Center, how can I help you?, is correct.
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