In macroeconomics, the consumption function Select one: O A. and the aggregate expenditure function are the same. O B. refers to the relationship between an individual's consumption and his/her wealth. C. describes the relationship between desired consumption expenditure and the factors that determine it, like national income. O D. is relatively unimportant in macroeconomics, because consumption is such a small component of aggregate expenditure. O E. refers to the relationship between consumption expenditure and relative prices