Which of the Following Explains Why Talented National Hockey League

Which of the following explains why talented national hockey league players command much higher salaries than neurosurgeons?

A) because the total value of hockey games is much higher than the total value of neurosurgery
B) because it takes far more skill and training to be a national hockey league player than to be a neurosurgeon
C) because the supply of talented national hockey league players is relatively low compared to the supply of neurosurgeons. Therefore, national hockey league players exert far more market power than neurosurgeon.
D) because the supply of talented national hockey league players is low relative to its demand compared to the supply of neurosurgeons relative to demand for their services. Therefore, adding another player yields far greater marginal benefit than adding another neurosurgeon.