A) Incorrect. Gastrointestinal cancers can present with a wide range of symptoms, and severe abdominal pain is just one possibility. However, not all cases present with such clear signs.

B) Correct. In the early stages, gastrointestinal cancers may not cause noticeable symptoms. Regular screenings, such as colonoscopies and endoscopies, are crucial for early detection.

C) Incorrect. Gastrointestinal cancers primarily affect the internal organs, and skin changes and rashes on the abdomen are not typical symptoms.

D) Incorrect. While weight loss and loss of appetite can be symptoms of gastrointestinal cancer, they are not the only manifestations. Other symptoms may include changes in bowel habits, blood in stool, abdominal discomfort, and more.