I would say C.) Osteoarthritis
i say this because cataracts are directly on the eyes, glaucoma does cause blindness and you can get glaucoma from Osteoarthritis but diabetes can directly make you blind by having to get an eye removed
Answer:
Subtract your heart's resting rate from your maximum rate. For example, if you are 40 years old, subtract that number from 220; your maximum rate is 180. Next, subtract your resting rate or 80 in this example. Your heart-rate reserve is 100 beats per minute.
