Answer:
d. is the answer to the question. i got a 100
Step-by-step explanation:
but in real life, its osteoporosis. osteoporosis (aka brittle bone disease) is a disease where your bones are weak and virtually useless. so physical activity is not helping at all, its wearing down on your bones even more than they are already. so if you have osteoporosis i STRONGLY SUGGEST for you NOT to exercise.