Please choose the correct ending to complete the given sentence: Health: [header] How to recognize colon cancer symptoms [title] Pay attention to blood in your stool. [step] If you have ongoing rectal bleeding that doesn't seem to be a result of hemorrhoids or a tear, it's a good idea to go to the doctor and get checked out. Blood in the stool is a common symptom of colon cancer.

Ending1: It's less common if your blood flow is limited or you find multiple lesions or tissue clogging your intestines. Also: the doctor will likely check for symptoms of colon cancer in you. Ending2: [title] Look for blood in your stool if you have vaginal bleeding. [step] If blood in your stool is a clear result of abstinence or pregnancy, then it may not be a sign of colon cancer. Ending3: [substeps] Blood can make your stool look either bright red or black. If you are not sure whether you see blood or not, be safe and contact your doctor nonetheless. Ending4: [substeps] If your stool has been treated, it may have a light yellow tint on it. You may experience high blood pressure, irritable bowel syndrome, or constipation.

Answer format: ending1/ending2/ending3/ending4