The outer layer of the cerebrum is called the

A) hippocampus.
B) cerebral cortex.
C) thalamus.
D) cerebellum.

The outer layer of the cerebrum is called the cerebral cortex. The hippocampus is a structure within the brain, but it is not the outer layer of the cerebrum. The thalamus is a separate structure within the brain that relays sensory information. The cerebellum is a separate part of the brain that is responsible for motor coordination and balance, and is not part of the cerebrum.