It is important to consult with a doctor or coach before beginning an exercise regimen because he or she
a. won't steer you wrong in identifying the right amount of exercise.
b. cannot tell you if the activity you want to try is right for you.
c. won't be sure you have all three types of exercise in your routine.
d. won't check your medical records to see if any illnesses or conditions would prohibit you from the activity.