Osteoporosis is a condition in which: a the joints become stiff and painful b the bones becomes infected c the bones loss mass and become prone to fracture d a ligament is torn

A condition in which bones become weak and brittle. is what it is so I believe C seems the right choice

I believe the choice would be C (The bones loss mass and become prone to fracture)
Hope this helps!

1.)dr. natterson- horowitz came to realize that their isn't much of a difference between animals and humans. just like humans, animals can suffer from illnesses and diseases like breast cancer, self injury, anxiety, and many more. she also discovered how they even treated and performed surgical procedures on animals just as if the animal it self were human. the los angeles zoo called dr. natterson- horowitz because they knew that she was a doctor and that  she would be able to recognize what was wrong with the gorilla. they knew that humans and gorillas were similar, so instead of calling another veterinarian, they called a doctor.