Dendrites:

a. conduct action potentials away from the cell body.

b. are present in mammalian nervous systems but not in the nervous systems of other vertebrates.

c. receive information from other neurons or from the external environment.

d. are coated in a fatty substance called the myelin sheath, which speeds up the rate at which signals are conducted.

e. are bundles of axons.

The correct answer is letter C. Dendrites receive information from other neurons or from the external environment. Dendrites are part of the neurons that are responsible for receiving information from the axon and the synapses that occur within the Central and Peripheral Nervous System. These dendrites branch off into multiple other synapses in order for the body to create a long chain of nerve impulses.