The correct answer is: C. horizon date
A horizon date is the date at which the growth rate of dividends is expected to change. In this case, the growth rate of dividends is expected to change after N periods. Therefore, N is the horizon date.
A growth date is the date on which a company’s dividends are expected to start growing at a non-constant rate. In this case, the growth rate of dividends is expected to change after N periods, so N is not the growth date.
A terminal date is the date at which the value of an investment is expected to be realized. In this case, the value of the investment is expected to be realized after N periods, so N is not the terminal date.