Evaluate how the complement system acts as a bridge between innate and adaptive immunity.

• A. The complement system directly replaces the need for adaptive immune responses.
• B. The complement system enhances the activity of antibodies and phagocytic cells from adaptive immunity to clear pathogens.
• C. The complement system functions solely by producing cytokines.
• D. The complement system only functions in innate immunity and has no role in adaptive immunity.

Answer: (B)