The organs that make up the system are; the mouth, the esophagus, stomach, small intestine, large intestine (including rectum), & anus. So your answer would be the B)Liver. The only thing the liver has to do with digesting is that it produces an important digestive liquid called bile. But it is not a digestive organ itself, it just helps the ones listed above digest. Hope this helps & makes sense. (:
