How do I respond to this statement "The Dividend Discount Model (DDM) is a popular method used to value stocks, but it also has some limitations. One limitation is that the DDM assumes a constant rate for future dividend growth. This assumption may not always be realistic, since companies' dividend growth rates can fluctuate over time due to changes in their financial performance and industry conditions. Another limitation of the DDM is that it is sensitive to the discount rate used for the valuation. Since the discount rate is the rate of return that investors require for compensation, a small change in the discount rate can lead to a significant change in the stock's valuation. Lastly, the DDM only takes into account dividends when valuing a stock; it ignores other important factors such as cash flow, earnings, and growth potential. This means that the DDM may not reflect an accurate valuation for those companies that do not pay dividends or have low dividend yields