The portion that follows the first twelve inches of the small intestine is the:

A) jejunum.
B) duodenum.
C) ileum.
D) cecum.

Jejunum

The middle section of the small intestine in humans and most higher vertebrates, between the duodenum and the ileum.

Duodenum

The first part of the small intestine immediately beyond the stomach, used for the initial processing of nutrients.

Cecum

The first part of the large intestine, into which the ileum opens.