Please hurry! :) 15 points
Why is it most important to know a person’s thesis factor before a blood transfusion?

A: A patient who is Rh+ can receive only Rh- blood.

B: A patient who is Rh- can receive only Rh+blood.

C: A patient who is Rh+can receive only Rh+blood.

D: A patient who is Rh- can receive only Rh- blood.