Answer:
20 minutes three times a week ( C )
Step-by-step explanation:
On the moderate to achieve maximum health benefits like weight loss,maintaining a weight or meeting physical goals it is worthy to exercise at least 30 minutes a day. and 3 hours a week
From the options given exercising 20 minutes three times a week is also going to help gain health benefits as well.
Health benefits are the benefits/wellness we get in regards to our well being from either exercising regularly or eating/living a healthy life style.