A. Diarrhea is not a direct risk of stopping TPN abruptly. B. Abruptly stopping TPN can cause hypoglycemia because the high glucose content in TPN leads to increased insulin production. Without the continuous glucose infusion, blood sugar levels can drop rapidly. C. Hypovolemia is not a common outcome from stopping TPN suddenly. D. Erythema at the site is unrelated to the cessation of TPN and more commonly related to local site reactions or infection.