Answer:
If the heart rate monitor says you're working at 50 to 60% of your max heart rate, then the exercise is considered moderate. If the heart rate monitor shows that you're working at 70 to 85% of your heart rate then it's vigorous exercise. To find your maximum heart rate, subtract your age from 220.
Explanation:
C. the qualifications of the author
The person in the advertisement might be an actor, and she should be hesitant about the product. Always make sure you ask your doctor before using a product.
D because many people don't see the depression and anxiety that comes with worrying about money as important as drug addiction or feelings of inadequacy
