Which statement regarding aggregate demand is true?What does the expression Y (C + T) represent? Gross domestic product (GDP) Public savings Government savings Investments It expresses an inverse relationship between price level and real gross domestic product (RGDP). It represents a positive relationship between price level and real gross domestic product (RGDP). It represents the fixed amount of real gross domestic product (RGDP) that can be produced. It represents the relationship between price level and the amount of real gross domestic product (RGDP) that producers are willing to produce