Which letter identifies the corpus callosum?
This diagram shows the human brain. Letter A indicates the largest and most superior region of the brain that contains many small ridges. Letter B indicates a small, horseshoe-shaped region just under region A. Letter C indicates a cauliflower-shaped region at the base of the brain on the posterior side. Letter D indicates the stalklike region at the base of the brain, just above where the brain connects to the spinal cord.
A
B
C
D