Answer:
B) antigens
Step-by-step explanation:
- A biologic chemical moderator is a medicine that is used to relieve pain such as during inflammatory or inflammatory responses. These moderatos are soluble and diffuse easily.
- Antigens are molecules that are present outside the pathogens, the body triggers a normal immune response in case of targeted by an antibody. There can be exogenous and endogenous that is internal and external.