If a family's annual disposable income rose from $60 000 to $65 000 and their desired consumption expenditures rose from $50 000 to $54 000, i can be concluded that the family's Select one: O A. marginal propensity to save is 0.8. B. average propensity to save is 0.8. O C. marginal propensity to consume is 0.8. O D. average propensity to consume is 0.8. O E. marginal propensity to consume is $800