Final answer:
Cholecystitis often causes symptoms 30 minutes after eating fatty foods, particularly at night, due to gallstones blocking the bile duct and leading to pain and jaundice. The pancreas produces most fat-digesting enzymes.
Step-by-step explanation:
The symptoms described in the question are indicative of B. Cholecystitis, which is inflammation of the gallbladder. This condition is often associated with the presence of gallstones and can cause intense pain, especially after eating a high-fat meal. The pain from cholecystitis is typically felt about 30 minutes after consumption of fatty foods and often occurs at night. The liver synthesizes bile, which aids in the digestion of fats, and the bile is stored in the gallbladder. When gallstones block the bile duct, pain and other symptoms such as jaundice may occur.
Regarding the reference question, most fat-digesting enzymes are produced by the d. pancreas. These enzymes, including lipase, help break down fats into smaller molecules that can be absorbed in the small intestine.