The ACSM recommendation for intensity, duration, and frequency of cardiorespiratory exercise for apparently health individuals includes ______________.
A) Intensity of 60%-90% HRmax, duration of 20-60 minutes, and frequency of 3-5 days per week
B) Intensity of 85%-90% HRmax, duration of 30 minutes, and frequency of 3 days a week
C) Intensity of 50%-70% HR max, duration of 15-45 minutes, and frequency of 5 days a week
D) Intensity of 60%-90% HRmax reserve, duration of 20-60 minutes, and frequency of 7 days a week