When a business is faced with a limiting factor (one which limits the activity of an entity) and there is a choice to be made between options to follow, which of the following statements describes the optimal course of action?

(A) Choose the option which gives the highest unit profit.
(B) Choose the option which gives the highest unit contribution.
(C) Aim to achieve a balance of activities covering all of the options.
(D) Choose the option which gives highest contribution per unit of limiting factor.