问题
单项选择题
At low wage rates, will an increase in the wage rate most liken result in: The substitution effect An increase in the supply of labor（）
A. Yes No
B. Yes Yes
C. No No
答案
参考答案：B
解析：
At low wage rates, an increase in the wage rate will induce a worker to work longer hours, leading to the substitution effect and an increase in the quantity of labor supplied.