Which Is the Most Accurate Statement

Which is the most accurate statement?

A) Doctors' incomes are high because the demand for their services is high relative to the supply.
B) Doctors' incomes are high because the supply of their services is high relative to the demand.
C) Doctors' incomes are low because the demand for their services is high relative to the supply.
D) Doctors' incomes are low because the supply of their services is high relative to the demand.