A. unsaturated hope this helps!!
Chemotherapy and/or stem cell transplant
I believe the answer would be B, provide support for a weakened joint. I don't think braces could protect you from big impacts, and I'm sure it's not just to keep your arm cool.
B- Bromine 26 since it’s based off the amount of neutrons which is given (the 25 protons is the number of the atomic number which is equal to the number of electrons)