In the short-run, if there is a positive level of output at which a firm's profit is maximised. Which of the following conditions must hold at that output level?
(A) The price must be less than the short-run avegare cost.
(B) The price must be equal to the short-run marginal cost.
(C) Price must be greater than equal to the short-run average variable cost.
(D) Short-run marginal costs must be non-decreasing.
Choose the correct answer from the options given below: