Answer:
Monroe is a healthy 55-year-old man who performs moderate-intensity physical activities and muscle strengthening exercises to stay fit.
According to recommendations of the U.S. Department of Health and Human Services, he should perform (A) 150 minutes of moderately intense physical activity each week.
Explanation:
The US health and human services department recommends about performing of moderate intensity exercise and exercises related to strengthening of muscle. In accordance with their recommendations an adult must perform the moderate intensity exercises for 150 minutes in a week. It also States that an adult must perform exercises for strengthening of muscle 2 times a week. They can also engage themselves in performing aerobic exercises and vigorous activities for their health benefits.