Which of the following is $($are$)$ true according to the Constant Dividend Growth Model $($or Gordon Model$)?$

The dividend growth model only holds if$,$ at some point in time, the dividend growth rate exceeds the stock's required return.

II$.$ A decrease in the dividerind growth rate will increase a stock's market value, all else the same.

III. An increase in the required return on a stock will decrease its market value, all else the same.

A$)$ I only

B$)$ III only

C$)$ II and III only

D$)$ I, II$,$ and III