Why do investors calculate different EPS levels?

A$.$

$$Preferred stock holders want to see what profits they could make if all profits were paid out.

B$.$

$$Tax professionals could see what different taxes would look like at different EPS levels.

C$.$

$$EPS helps show what would happen during a liquidation situation.

D$.$

$$Some income items can be used to predict future earnings, while others are unusual items that only affect the current year$$s profits, so EPS should also represent those separate items.