Answer:
D. Variable costing considers variable selling and administrative costs to be product costs.
Step-by-step explanation:
Under variable costing method all costs which are variable in nature are treated as product cost.
Therefore, even if it is selling and administrative cost also it is part of product cost under variable costing.
Although under absorption costing only directly related cost that is manufacturing cost is product cost, and no selling and administrative cost is product cost.
Thus, correct of all the above is option D