Final answer:
The parallel technique for radiographing a canine's teeth is used for the molar teeth, which are options C. 307, 308, and 309, as they are positioned to allow for a parallel arrangement between the teeth and the image receptor. The correct option is C. 307, 308, 309.
Step-by-step explanation:
When using a parallel technique for radiographing the permanent teeth of a canine, the aim is to achieve an image where the X-ray beam is parallel to the long axis of the tooth while the image receptor is placed parallel to the tooth on the opposite side.
The correct answer to the question about which teeth should the parallel technique be used on for canines is C. 307, 308, 309. These are the molar teeth, situated posteriorly in the oral cavity, and have several pointed cusps used to crush food.
In contrast, the other options represent other types of teeth, such as incisors and canines, which are located at the front of the mouth and are not typically subjected to the parallel technique due to anatomical considerations. The correct option is C. 307, 308, 309.