My best guess would be C. Assessing a patient's level of compliance with past medical advice. You want to know if they have followed medical advice prior because if they haven't, you would just be wasting your breath.
Answer:With this system, blood always flows in only one direction inside the heart. There are also valves at the bottom of the large arteries that carry blood away from the heart: the aorta and the pulmonary artery. These valves keep the blood from flowing backward into the heart once it has been pumped out.
Explanation:
That would be false, not ALL vaccinations offer complete protection
Food..........................
