Which of the following statement is false?

Multiple Choice

a. The contribution margin income statement format separates costs according to cost behaviour.

b. Fixed manufacturing overhead is treated as a product cost under absorption costing method.

c. Variable costing method is more useful than absorption costing approach in internal and managerial decision-making.d.

d. Fixed manufacturing overhead is treated as a period cost under absorption costing method.

e. The absorption costing approach is used in external financial reporting.