Final answer:
The statement that is true about digestion in the large intestines is that it primarily absorbs water and electrolytes, forming feces as a result.
Step-by-step explanation:
The correct answer to the question of which statement about digestion of food in the large intestines is true is: c) Large intestines primarily absorb water and electrolytes. The large intestine absorbs some vitamins, leftover salts, and a significant amount of water, a process that helps to form feces. While it does absorb these components, it does not produce enzymes for breaking down carbohydrates, it does not absorb nutrients directly into the bloodstream, and it does not initiate the breakdown of proteins-- these processes occur earlier in the digestive system, mainly in the stomach and small intestine.