which of the following is an example of mutalism? (1point)

A.Bacteria live in root nodules of a plant, processing nitrogen into ammonia for the plant and receiving protection and a steady food supply in return.
B.Moss benifits from exposure to light and moisture as it grows on a tree trunk that is not affected by its presence.
C.Fleas live in the fur of a dog where they periodically pierce the dogs skinand feed on its blood.
D.Cowbirds lay their eggs in the nests of other birds that are often tricked into rearing the cowbird chicks instead of their biological chicks.

Question

which of the following is an example of mutalism? (1point)

A.Bacteria live in root nodules of a plant, processing nitrogen into ammonia for the plant and receiving protection and a steady food supply in return.
B.Moss benifits from exposure to light and moisture as it grows on a tree trunk that is not affected by its presence.
C.Fleas live in the fur of a dog where they periodically pierce the dogs skinand feed on its blood.
D.Cowbirds lay their eggs in the nests of other birds that are often tricked into rearing the cowbird chicks instead of their biological chicks.