Professor Peach Is Lecturing in Her Class About Glial Cells

 Professor Peach is lecturing in her class about glial cells. She will tell her class that glial cells ______.

A) are less common than neurons in the human nervous system.
B) are responsible for transmitting information within the peripheral nervous system.
C) are the "glue" that holds all of the neurons together in the brain.
D) are not as well studied as neurons but have been shown to perform many important functions in the nervous system.