Bile is produced by the liver. It is a greenish-yellow fluid that helps to digest fats. Bile is stored in the gallbladder and released into the small intestine when food is eaten.
The stomach is a muscular organ that helps to break down food. It produces gastric juices that contain hydrochloric acid and enzymes that help to digest proteins.
The pancreas is a gland that produces digestive enzymes and hormones. The digestive enzymes help to break down carbohydrates, proteins, and fats. The hormones help to regulate blood sugar levels.
The duodenum is the first part of the small intestine. It is where bile and pancreatic juices are released to help digest food.
Therefore, the correct answer is A.