单选题 When workers agree to forego leisure to undertake labor and receive wages, the term that is applied in labor supply economics is the:

A. substitution effect.
B. income effect.
C. marginal rate of substitution.

【正确答案】 A

【答案解析】In labor supply economics, the term applied to the decision by workers to forego leisure and undertake labor for wages is the substitution effect.