Target heart rate is defined as the minimum number of heartbeats in a given amount of time in order to reach the level of exertion necessary for cardiovascular fitness, specific to a person's age, gender, or physical fitness.
Short term memery loss, loss of balence, dizziness, and stroke are the main things to watch out for. Hope this helps you out. :-)
I believe the answer is B. I hope this helps
The most appropriate answer is A because the others don't make sense at all.