Which of the following statements are accurate concerning the security market line (sml) approach? i. the sml applies only to firms with stable dividend growth rates. ii. like the dividend growth model, the sml generally relies on using the past to predict the future. iii. unlike the dividend growth model, the sml estimate is adjusted for risk. iv. the quality of the estimate from the sml approach is sensitive to the quality of the estimates of the variables in the model. a) i and iii onlyb) ii and iv onlyc) ii and iii onlyd) ii, iii, and iv onlye) i, ii, iii, and iv