Hemostatic drug
Antibiotics are used to treat an infection, so it wouldn’t be that one. Thrombolytic drugs are used to prevent blood clots, and they thin blood. So not that one. Coagulant drugs are used to thicken things, but this is a anticoagulant. Meaning it will thin it. I think the only logical answer would be hemostatic drug.
I think it’s A (students often walked or rode bikes to school).
