The Uses for Phage Display Include All the Following EXCEPT

The uses for phage display include all the following EXCEPT

A) antibody fragments cloned from synthetic sources.
B) the identification of high-affinity peptides that bind to attachment proteins of some eukaryotic viruses and effectively block viral infection.
C) antibody fragments cloned from natural sources.
D) collections of mutant enzymes to be tested for activity.
E) directed evolution projects.