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
I believe "reasonable" would be the word you are looking for there.
Answer:
Question 1
answer: all of the choices are correct
Question 2
Early childhood
Question 3
Infancy
Answer: Depending how your body is reacts to it- the results are different- if your stomach doesn't handle spicy foods too well, it'll hurt you. But if your just fine- then there shouldn't cause any problem.