The annual growth of Omega in operations fluctuates substantially. As a result, using the dividend discount model (DOM) to estimate Omega's cost of retained urine is difficult because a the stock's dividend yield is extremely cult to estimate b. its growth rate not stable, which makes it difficult to estimate the market price of its common stock is very volatile. d. the firm's growth rate might be negative for an extended period of time its net income is dithcult to compute