Respuesta :
Answer:
A .....the skin is the bodies first line of defense
Explanation:
The first line of defence is non-specific and aims to stop microbes from entering the body.
Answer:
Antigens trigger the production of antibodies, which mark bacteria for destruction.
Explanation:
The question is talking about internal response to bacteria so we have to look at what happens inside the body pertaining to bacterial infection, so the answer is "Antigens trigger the production of antibodies, which mark bacteria for destruction".