What Do All of These Diseases -- Amoebic Encephalitis, Rabies

Multiple Choice

What do all of these diseases -- amoebic encephalitis, rabies, Creutzfeld-Jacob disease -- have in common?

A) They are all transmitted through animal bites.
B) Mortaility rates are all extremely high.
C) There is a genetic component to all of these diseases, in addition to the infectious agent.
D) They are all caused by protozoans.