Why is it important for managers to know what stage the industry life$-$cycle is in$?$

A$.$ It helps managers to know what the relationship with competitors will be like.

B$.$ It helps managers to understand how important marketing and pricing might be at a certain stages.

C$.$ It helps managers to understand the profit potential of that industry.

D$.$ All of the above are true.

E$.$ A and C only are true.