Compared to infants' brains, adults' brains ______.

A) have fewer connections among neurons
B) comprise a significantly larger percentage of the body size.
C) completely comprise non-myelinated neurons.
D) have around 10 billion neurons.

Myelinated Neurons

Nerve cells that have been covered with a myelin sheath, which increases the speed at which electrical impulses are conducted.

Connections

Relationships or associations between people, places, or things, often implying a network of interactions.

Neurons

Specialized nerve cells that convey information via electrical and chemical signals in the nervous system.