The immune system fights off the pathogen by Leukocytes also known as white blood cells. When a pathogen enters the body the immune system becomes alert to it and sends out sends out the Phagocytes (a type of Leukocytes) which engulfs the pathogens.
Answer:
just look it up its easier u wont no answers on here quick
B makes the most sense to me so I would go with that
Answer: I think it is B but im not 100% sure if not B then its A but im 80% sure its B so you choose.
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