Which of the Following Is NOT Considered a Function of an Antibody

Which of the following is NOT considered a function of an antibody?

A) They can bind two microbial cells together, leading to agglutination.
B) They can enhance phagocytosis.
C) They can produce toxins that directly kill bacteria.
D) They can block the attachment molecules on the surface of bacteria and viruses in order to prevent them from attaching to their target cells.
E) They can bind to crucial parts of toxins and deactivate them.