For the zero growth model: Select one: O a. because the valuation formula reduces to the equation for the future value of an ordinary annuity, the process is essentially the same for valuing preferred shares O b. because the valuation formula reduces to the equation for the present value of an ordinary annuity, the process is essentially the same for valuing preferred shares O c. because the valuation formula reduces to the equation for the future value of a perpetuity, the process is essentially the same for valuing preferred shares O d. because the valuation formula reduces to the equation for the present value of a perpetuity, the process is essentially the same for valuing preferred shares