C and D
There are three features that distinguish the large intestine from the small intestines. The large intestine does not have a continuous longitudinal muscle layer--instead, it has three strips of longitudinal muscle known as teniae coli. The large intestine is covered with omental appendages, which are fat-filled pendants of peritoneum on the surface of the large intestine. Finally, the large intestine is folded into sacculations known as haustra, which form where the longitudinal muscle layer of the wall of the large intestine is deficient.
Serosa is a general term for the outermost coat or serous layer of a visceral structure that lies in the body cavities of the abdomen or thorax. Circular folds are found in the small intestine, and semilunar (sometimes called semicircular) folds are found in the large intestine. These folds are actually much more prominent in the small intestine; in the large intestine, there are mostly semicircular folds which do not continue around the entire intestine.