46. Ruminant animals, such as cows, have specialized digestive systems that allow them to obtain significant nutrients from cellulose-rich plant material. Which of the following best describes the key adaptation responsible for this ability?(A) They have an extended small intestine for increased absorption surface area.(B) Their stomach has four chambers, with mutualistic microorganisms digesting cellulose in the rumen and reticulum.(C) They produce unique enzymes in their abomasum that directly break down cellulose.(D) They re-ingest their feces to re-process undigested plant matter, similar to coprophagous animals.