A nurse is providing education to a client who needs a cholecystectomy due to a build-up of calculi or gallstones. Which of the following is the best response from the nurse to explain what caused this problem?

A. The gallbladder has become inflamed due to a build-up of gallstones that are blocking the common bile duct: Gallstones can form when bile becomes too concentrated, leading to inflammation and blockage of the common bile duct. This blockage causes pain and potential infection. B. The gallbladder became infected by a virus and needs to be removed: While infections can occur in the gallbladder (e.g., cholecystitis), they are typically due to bacterial infections, not viral ones. The primary issue in this case is the presence of gallstones causing inflammation. C. The gallbladder is no longer working: The gallbladder may still function to some extent, but the presence of gallstones can disrupt its ability to properly release bile, leading to symptoms that require surgical intervention. D. The gallbladder has become inflamed due to the cholesterol in the gallstones: While cholesterol can be a component of gallstones, gallstones can also contain other substances like bile pigments. The focus should be on the stones blocking bile flow and causing inflammation.