The answer is D “Plaque can build up and prevent oxygen from reaching the brain”.
Your heart rate should drop to about 120 beats per minute within five minutes after the workout and less than 100 beats per minute after ten minutes.
Generally depending on the antibiotic they target the phospholipids on the plasma membrane of the bacteria in your system that is making you sick I say bacteria viruses generally mutate so frequently that their phospholipids cannot be targeted which is why when you have the flu all that can cure you is time, you can only hide the symptoms.