[Solved] Since what event has the term smoke-filled room come to mean "a place behind the scenes where hypothetical cigar-smoking party bosses choose candidates"? A) The presidential campaign of John Quincy Adams B) The nomination of Warren G. Harding as a presidential candidate C) The concession to opponents of Hubert Humphrey during a presidential election D) The close primary race between candidates Hillary Clinton and Barack Obama Occult Blood: Blood that is not visible to the naked eye, often detected in stool or urine samples through laboratory tests. Peristalsis: The series of wave-like muscle contractions that moves food through the digestive tract. Irritable Bowel Syndrome: A chronic gastrointestinal disorder characterized by abdominal pain, bloating, and alteration of bowel habits without any organic cause. Ulcerative Colitis: A chronic inflammatory bowel disease that causes ulcers and inflammation in the innermost lining of the colon and rectum.