Answer:
Target heart rate is generally expressed as a percentage (usually between 50 percent and 85 percent) of your maximum safe heart rate. The maximum rate is based on your age, as subtracted from 220. So for a 50-year-old, maximum heart rate is 220 minus 50, or 170 beats per minute.
Explanation:
It is more effective than using an improvisation tactic against an opposing team
i would say c, because many people are in need for new livers, kidneys, etc, and it does save a lot of lives per year
