Visceral pain from the appendix travels in afferent fibres that run with the sympathetic nerves and enters the spinal cord at T10. T10 is also the segment of the umbilical dermatome, which is why the early pain is felt around the umbilicus. The bank picks the T10 answer because it explains the periumbilical site. However, option C describes the same pathway from the other end, using the same source sentence. Option A is wrong (an anterior root is motor, and the level is not T9), and option D is wrong because the pain is not carried by parasympathetic afferents.