Definition: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Input: [header] How to treat a sea urchin sting [title] Recognize a sea urchin sting. [step] In order to treat a sea urchin sting, you must be certain you were stung by an urchin and not another marine animal. [substeps] Sea urchins have flat or globe shaped bodies and are covered in spines. <sep> (A) Sometimes they have pinholes on their faces or quills on their red gills. They also have large, round eyes that are reddened from hard sun exposure. (B) But when you see an individual in an animal scene or from behind, you may be able to see their tooth resting on their lips in an attempt to bite the skin. To see if there is another animal in the scene, you will not have to do anything else to confirm your senses. (C) They are found in oceans worldwide, but are more likely to be present in warmer regions. Sea urchins lurk in rocky parts of the water and will sting if threatened. (D) They also carry a large head, which irritates the skin on the face because they pick up a lot of the content and skin lies atop them. Be aware that these may be very expensive when it comes to caring for a sea urchin bite.
Output:
C