Final answer:
The most common signs of colorectal cancer are rectal bleeding, anemia, and a change in stool.
Step-by-step explanation:
The most common signs of colorectal cancer (CRC) are rectal bleeding, anemia, and a change in stool.
Rectal bleeding occurs when there is blood in the stool. It can either be obvious, seen as bright red blood in the toilet bowl or on the toilet paper, or occult, which means that the blood is hidden in the feces and may not be visible. Anemia is a condition that occurs when there is a decrease in the amount of red blood cells or hemoglobin in the blood. A change in stool refers to any noticeable difference in the color, consistency, or frequency of bowel movements.
It is important to note that these signs can also be indicative of other conditions, so it is recommended to consult a healthcare professional for an accurate diagnosis.