Which of the following is not true when deciding whether to discontinue a product line? OA product should be discontinued if it has a negative contribution margin per unit. O None of the items in this list of answers. OA product should be retained if the cost savings from discontinuing the product exceeds the revenues lost from discontinuing the product. O Unavoidable fixed costs are those that exist even after a product is discontinued. A product line that is not covering its fixed costs should be discontinued if it has a negative contribution margin