14.) Not sure...
15.) B.)
16.) D.), but X-rays can't detect that, anyway, but isn't the main cause
17.) D.)
Hopefully, this isn't a test.
If you found this especially helpful, I'd appreciate if you'd vote me Brainliest for your answer. I want to be able to assist more users one-on-one, as well as to move up in rank! :)
