The correct option is D Succus entericus
While the chyme is present within the small intestine, glands within this structure begin to secrete different types of digestive enzymes called carbohydrases (amylase, proteases, and lipases or fat splitting enzymes). The glands responsible for these enzymatic secretions are called the crypts of Lieberkuhn. Another set of glands called Brunner's glands are responsible for the secretion of mucus. Collectively, the intestinal secretions are referred to as succus entericus.