(Solved): When performing an ELISA, a veterinary technician notes that some wells haven't changed color while ...

When performing an ELISA, a veterinary technician notes that some wells haven't changed color while others have changed color significantly. What does a color change indicate in an ELISA? A) It indicates that agglutination is present. B) The enzyme-antigen-antibody complex is present. C) It indicates that agglutination is absent. D) The enzyme-antigen-antibody complex is absent.