Final answer:
For a temporary increase in the wage rate, the amount of labor supplied is likely to increase as the income effect is less than the substitution effect(b).
Step-by-step explanation:
In a labor-leisure choice, every wage change has a substitution and an income effect. The substitution effect of a wage increase is to choose more income, since it is cheaper to earn, and less leisure, since its opportunity cost has increased. The income effect of a wage increase is to choose more of leisure and income, since they are both normal goods. The substitution and income effects of a wage decrease would reverse these directions.
When it comes to a temporary increase in the wage rate, the income effect is likely to be less than the substitution effect(b). This means that the amount of labor supplied will increase as a temporary wage increase makes it more attractive to work for more income.