Which of the Following Should the Nurse Instruct a Client

Which of the following should the nurse instruct a client who desires to reduce his blood pressure through increasing physical activity?

A) Regular exercise can lower the blood pressure by 5 to 10 mmHg.
B) Regular exercise must be done 7 days a week.
C) Regular exercise has to be done for at least 2 hours each day.
D) Regular exercise is the participation in aerobic activities.