Agglutination Tests Make Use of the Fact That

Agglutination tests make use of the fact that

A) T cells will release interferon- gamma during certain infections.
B) antibodies have two antigen- binding sites and will cause clumping when bound to antigen.
C) antibodies bound to antigen will precipitate in a gel matrix.
D) a reporter enzyme can be bound to an antibody to provide a visual change with a positive test.
E) the presence of antibodies in a patient's serum will prevent viral infection of cells in culture.