When raising external capital is costly, how should the costs of issuing new stocks and bonds be considered (according to this video)? Group of answer choices

a) Add the external financing cost directly at period zero

b)Multiply the cost of equity and cost of debt by the external financing cost and then calculate WACC.

c)Subtract the external financing cost from the last period

d)Subtract the external financing costs directly at period zero and do not calculate WACC any differently.