Blood type O, it can be given to other types, but it can not receive other types, because of the different properties in the blood.
Not true. If you have any immunocomprising diseases it is unsafe. Also if you have open sores or sores you can infected.
I'm not 100% sure but I believe the correct answer is A. Lupus. Lupus symptoms may include a red rash, pain in the muscles, fatigue and cognitive problems which may lead to confusion and memory loss. So I think that A is the answer. Hope this helps. :)