In a teaching session, Small-bowel obstruction is correctly explained as:

A. Mechanical or pharmacological measures used to reduce perioperative venous thromboembolism. B. Raised pressure within a closed fascial compartment that threatens tissue perfusion. C. Mechanical or functional blockage causing pain, vomiting, distension and reduced passage of stool or flatus. D. Circulatory failure caused by acute blood loss and inadequate tissue perfusion.