Final answer:
A visual examination of organs and cavities is commonly done with an endoscope, a device that allows for viewing and surgical procedures within the body. The correct answer is D. endoscope.
Step-by-step explanation:
A visual examination of the interior of organs and cavities is commonly performed with an endoscope. An endoscope is a medical device used to explore the body through various orifices or minor incisions. The device has fiber bundles that transmit light to illuminate internal parts; the reflected light is then transmitted back out for observation.
An endoscope not only provides a visual insight into the body but also facilitates surgical procedures, such as arthroscopic surgery. In addition, it allows for the collection of samples, like lassoing an intestinal polyp for external examination. The correct answer is D. endoscope.