You’re correct in my opinion they all seem to be contamination
Giving the person type a or type B or type O blood would introduce antibodies into the blood that the body wouldn't be able to control
C. loud noise or music because infection and injury do not occur often and aging wouldn't make any sense.
Large amount of paper on a bulletin board.
It will make you tired and tou will just want to sleep ( i know this from exsperiience)
