Question

Is important to cancer patients

because it is a two-way fight:
A Immune system
B Antibodies
C Antigen system
D none of the above​

Answer 1

I believe the answer is A. Immune system and B. antibodies.

Step-by-step explanation:

I think this is it because cancer is caused by multiplying cells in the Immune system, and the body is at war with itself, so that's why I believe this is the answer. Also because the antigen system is blood types, and that seems kinds irrelevant to the question. Hope this helps!