Full costing is A) less likely to enable managers to manipulate income by increasing production. B) more useful for decision making than variable costing because it treats all costs of production as an inventory cost. C) required for financial reporting under generally accepted accounting principles. D) based on cost behavior. 34. Full costing is A) less likely to enable managers to manipulate income by increasing production. B) more useful for decision making than variable costing because it treats all costs of production as an inventory cost. C) required for financial reporting under generally accepted accounting principles.- D) based on cost behavior. LI