The answer to this is Culture
Answer:
B. improved methods of sanitation is the answer.
Explanation:
Interval training maximizes cardiovascular benefits, so it can quickly increase stroke volume, making your heart stronger, and more efficient. It also decreases your risk of heart disease and high blood pressure.
Ways society can be affected by stds or stis are sexual contact, and the mixing of bodily fluids such as blood, spit (in some stds or stis), sweat (only in some stds or stis), urine, etc.