When calculating the afterminustax weighted average cost of capital (wacc), which of the following costs is adjusted for taxes in the equation? a. the before−tax cost of preferred stock
b.the before−tax cost of equity
c.the after−tax cost of debt
d.the before−tax cost of debt

The before-tax cost of debt is adjusted for tax in the computation of weighted average cost of capital.

The correct answer is  D

Explanation:

In the calculation of weighted average cost of capital, the before tax cost of debt is adjusted for tax so as to obtain the after-tax cost of debt. Cost of equity and cost of preferred stocks will not be adjusted for tax.

The event "d. an increase in the rate of immigration" can change the labor supply curve.

Explanation: when the production price increases, the labor demand curve shifts to the right.

When a technological advance is incorporated according to the type of technology, the demand curve can shift to the left or right.

An increase in the salary rate would result in a change in the amount of work offered because the amount of work an individual offers depends on the salary rate.

An increase in the immigration rate shifts the labor supply curve because it would imply that the number of people willing to work increases.