This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Development of GU system and Neuro-vascular supply of pelvis & perineum, Subject name: Anatomy
A 37-year-old small business manager receives a gunshot wound in the pelvic cavity, resulting in a lesion of the sacral splanchnic nerves. Which of the following nerve fibers would primarily be damaged? 
Select and explain. 
A. Postganglionic parasympathetic fibers, B. Postganglionic sympathetic fibers, C. Preganglionic sympathetic fibers, D. Preganglionic parasympathetic fibers
C: Preganglionic sympathetic fibers
Answer: C: Preganglionic sympathetic fibers 
Explanation: The sacral splanchnic nerves consist primarily of preganglionic sympathetic neurons and also contain GVA fibers. None of the other fibers listed are contained in these nerves.