Your answer is C work together to perform a specific function because of the systems in the body has one important body function so that we don't die because are body not right.
Here are a couple of organ systems that keep us alive... .Digestive System .Executory System .Circuitry System .Nervous System .and more
They all work together to keep are body functioning properly.
Also its not A because all cells are different because all of us are different because of are genes its not B because there sometimes different tissue depends on which organ system its also not D because they do work together but not everything is multicellular that's how I came with C.
(((First part of the small intestine))). It connects to the stomach. The duodenum helps to continue digesting food that comes from the stomach. It absorbs nutrients (vitamins, minerals, carbohydrates, fats, proteins) and water from food so that the body can use them.
