Analyze how antibodies are used in ELISA to detect the presence of specific antigens.

• A. Antibodies change the pH of the solution, indicating antigen presence.
• B. Antibodies destroy antigens, confirming their presence.
• C. Antibodies bind to specific antigens, allowing for detection through a colorimetric change.
• D. Antibodies precipitate antigens, making them visible to the naked eye.

Answer: (C)