Final answer:
The medical office assistant should ask the patient which insurance carrier they have to address the error regarding their medical coverage and determine if the services they need will be covered. Option 2.
Step-by-step explanation:
The medical office assistant should ask the patient the second question, Which insurance carrier do you have? Option 2. This question is important because it directly addresses the error regarding the patient's medical coverage. By knowing the patient's insurance carrier, the medical office assistant can investigate and resolve the issue with the EOB (Explanation of Benefits) received by the patient. It also helps determine if the doctor's order for blood screening and the prescription for blood pressure meds will be covered by the patient's insurance.