For a worker who is deciding how many hours of labour to supply, all of the following are true regarding the optimal choice except that:

a. The income effect of a wage change equals the substitution effect.

b. The marginal rate of substitution between income and leisure is equal to the wage rate.

c. The market wage rate is at least equal to the reservation wage for a participant.

d. The slope of the budget line equals the slope of the indifference curve.