You evaluate a 34-year-old man who is recovering from a spinal cord injury sustained in a motorcycle accident. He confides in you that he has not been able to achieve an erection since his accident....

You evaluate a 34-year-old man who is recovering from a spinal cord injury sustained in a motorcycle accident. He confides in you that he has not been able to achieve an erection since his accident. Which of the following neurons is most likely to have been affected?

A. Preganglionic sympathetic neurons

B. Neurons in the splanchnic ganglia

C. Cranial preganglionic parasympathetic neurons

D. Postganglionic sympathetic neurons

E. Sacral preganglionic parasympathetic neurons