Answer:
C) Archaea
Explanation:
From the following answers, archaea are known to not cause infectious diseases. According to Matthew Bates from the University of Lincoln, here are three possible hypothesis of why archaea does not cause infectious diseases:
1) Evolution or virulence/pathogenicity is 'rare' or 'unlikely'
2) Less diversity within Archea so virlence/pathogenicity not evolved.
3) Bacteriophage drive virulence/pathogenicity in bacteria, and phage don't infect Archea.
