For Many Jobs, as Wages Increase, the Quantity Supplied of Labor

For many jobs, as wages increase, the quantity supplied of labor increases. This set of facts is evidence that the

A) substitution effect is larger than the income effect and the supply of labor curve is upward sloping.
B) income effect is larger than the substitution effect and the supply of labor curve is upward sloping.
C) substitution effect is larger than the income effect and the supply of labor curve is backward bending.
D) income effect is larger than the substitution effect and the supply of labor curve is backward bending.