The correct answer is option 3: X-rays are not able to capture clear pictures. X-rays work by passing through the body and creating an image based on the varying absorption of the X-rays by different tissues. However, the intestines are made up of soft tissue, which does not absorb X-rays as well as denser tissues like bones. This makes it difficult for the X-rays to create a clear image of the intestines. In order to visualize the intestines, a contrasting agent, such as barium, is often ingested by the patient. The barium helps to highlight the intestinal tract on the X-ray image, making it easier for radiologists to assess any abnormalities or conditions. Taking direct X-ray photographs of the intestines without the use of a contrasting agent may result in unclear or inaccurate images.