Astrocytes Influence the Connectivity Between a Pre- and Postsynaptic Neuron

Astrocytes influence the connectivity between a pre- and postsynaptic neuron by

A) causing additional storage of glycogen within neurons, thereby increasing their metabolism.
B) increasing myelination of neurons, which results in faster action potentials.
C) decreasing the permeability of blood vessels, thereby aiding in the supply of nutrients to neurons.
D) taking up and releasing neurotransmitters and therefore altering the activity of neurons.
E) conducting action potentials, which increase the flow of information.