Scientists Recently Cloned Louis Pasteur and Put Him Back to Work

Scientists recently cloned Louis Pasteur and put him back to work in a modern lab. He promptly developed a gel that breaks down proteins. Since he hasn't been around for some time, he's unsure what the best application for his invention might be. Help him out-what pathogenic item would this gel be most effective and safe at eliminating?

A) Viroids on the surface of agricultural plant tissues.
B) Prions inside the central nervous system of cows.
C) Viruses on the surface of the skin.
D) Bacteria in the intestines of human beings.
E) The fungus that causes athlete's foot between people's toes.