Aquarium keepers are typically advised to remove dead
fish from an aquarium the moment they are discovered.
Otherwise, the water may soon become cloudy due
to a bacterial bloom. Which of the following best
explains why a bacterial bloom should be avoided?
A The bacteria acting on the dead organism may 1
infect other fish and aquatic organisms, causing
an aquarium plague.
B The cloudiness in the tank prevents the fish
keepers from properly observing their pets.
C The bacteria may become airborne with the
evaporation of water from the aquarium and
cause diseases in the external environment.
D The sudden spike in bacterial population may
result in insufficient dissolved oxygen for the
other aquatic organisms, causing more aquatic
life to die.
It should be option A.