Westonci.ca is the premier destination for reliable answers to your questions, brought to you by a community of experts. Connect with a community of experts ready to help you find solutions to your questions quickly and accurately. Explore comprehensive solutions to your questions from knowledgeable professionals across various fields on our platform.

Mr. Thayer has an internal infection that has spread to the membrane lining the abdominal cavity, which enfolds its internal organs. His infection has spread to his ______.
A. Peritoneum
B. Perineum
C. Pariceum
D. Parietal