Which of the following American College of Sports Medicine recommendations is accurate for moderate-intensity exercise?

A) Moderate-intensity exercise should be performed for at least 30 minutes,5 or more days per week.
B) Moderate-intensity exercise should be performed for at least 20 minutes,3-5 days per week.
C) Vigorous-intensity exercise should be performed for at least 30 minutes,5 or more days per week.
D) Vigorous-intensity exercise should be performed for at least 60 minutes,2-3 days per week.