<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 68-year-old man comes to the physician for a wellness visit. Physical examination shows an enlarged and nodular prostate. Laboratory studies show elevated levels of prostate-specific antigen. A prostate biopsy confirms the diagnosis of prostate cancer and a radical prostatectomy is planned. This patient should be counseled on the increased risk of injury to which of the following structures?? A: Cavernous nerve, B: Superior vesical artery, C: External anal sphincter, D: Hypogastric nerve, E: Distal uretern,  <response>: This is a question about counseling a patient who is undergoing radical prostatectomy for prostate cancer. The key point is that radical prostatectomy carries a risk of injury to nerves and structures near the prostate.Choice A, the cavernous nerve, is correct. The cavernous nerves control erectile function and run alongside the prostate, so they are at risk during prostatectomy. Choice B, the superior vesical artery, is incorrect. While vessels may be ligated during surgery, injury to this artery is not a common risk.Choice C, the external anal sphincter, is incorrect. The sphincter is too far from the prostate to be directly injured during prostatectomy. Choice D, the hypogastric nerve, is incorrect. The hypogastric nerves are superior to the prostate and should not be injured during this surgery.Choice E, the distal ureter, is incorrect. The distal ureters drain the kidney and are not near the prostate.A: Cavernous nerve 