Instructions: 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 diagnose a fistula [title] Check for pain around the anus or genitals. [step] Pain and irritation are common symptoms of many types of fistulas. You may experience pain and swelling around anus, genitals, or the area between the genitals and anus (the perineum). <sep> (A) The pain may feel like a burning sensation or pain in your abdomen. Treat the issue immediately by touching or noticing any unusual itching. (B) If the pain or irritation goes into the anal region, then you may have fistulas inside. [substeps] Most fistulas will go away on their own and will not return. (C) [substeps] Anal fistulas may cause pain during bowel movements. Fistulas involving the vagina may cause pain during sexual intercourse. (D) If you feel pain while trying to or to ejaculate, it's probably a sign of anus irritation. Pain around an anus could also be one of several other symptoms of fistulas.
Output:
C