The bacterium known for causing pseudomembranous colitis, a potentially deadly superinfection, is

Clostridium difficile

Explanation:

Clostridium difficile are anaerobic gram-positive rod-shaped bacteria. This species of Clostridium has an incubation period of days to weeks and causes severe diarrhea and fever. It causes antibiotics related colitis termed as pseudomembranous colitis. The epithelial lining of colon undergoes necrosis due to the bacterial toxins. The affected individuals exhibit abrupt diarrhea, presence of blood and toxins in stool.

plato users

given bodies of water

pacific / arctic / indian / southern

[ a ] the caribbean sea

[ b ] the northern ocean

[ c ] the atlantic ocean

[ d ] the barents sea

with this being the given answers