B cells are only active during a specific immune system. Thus, the correct option is D.
What is the immune system?
The immune system may be defined as the complete set of cells and organs that defends the body against foreign invaders to prevent the cause of infection and disease.
Lysozymes, neutrophils, and macrophages provide a general mechanism to defend your body against foreign invaders because these are the cells of innate immunity.
While B cells are only active during a specific immune system because these cells are part of adaptive immunity and deliver a specific response to a particular foreign agent.
Therefore, B cells are only active during a specific immune system. Thus, the correct option is D.
To learn more about the Immune system, refer to the link:
https://brainly.com/question/823997
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