Multiple Choice Question 81 In a make-or-buy decision, which costs can be considered relevant? Incremental variable costs, incremental fixed costs, and sunk costs. Unavoidable variable costs, incremental fixed costs, and sunk costs. O Incremental variable costs, incremental fixed costs, and opportunity costs. O Incremental variable costs, unavoidable fixed costs, and opportunity costs. Click if you would like to Show Work for this question: Open Show Work