Final answer:
The three modifiable risk factors for an Ischemic Stroke are high blood pressure, illicit drug use, and atherosclerosis in the arteries of the brain.
Step-by-step explanation:
The three modifiable risk factors for an Ischemic Stroke are high blood pressure, illicit drug use, and atherosclerosis in the arteries of the brain. High blood pressure is the main risk factor for stroke, and keeping it within the normal range through lifestyle changes or medication can reduce the risk. Illicit drug use, specifically amphetamines or cocaine, can also increase the risk of stroke. Atherosclerosis in the arteries of the brain can lead to stroke, and managing risk factors such as old age, high blood pressure, diabetes, high cholesterol, and smoking can help reduce the risk.