Final answer:
The appropriate dosage range for dopamine for post cardiac arrest care is 5-20 mcg/kg/min.
Step-by-step explanation:
Dopamine is a medication that can be used in post cardiac arrest care to increase blood pressure. The appropriate dosage range for dopamine for patients with a blood pressure of 80-89 is 5-20 mcg/kg/min, which corresponds to option B. This means that for every kilogram of body weight, the patient should receive a dose of dopamine in the range of 5 to 20 micrograms per minute.