Expanded Rate of Return, r, and Real Interest Rate, I (%) Investment ($B) B A Investment ($B) Real Domestic Product, GDP ($B) Refer to the diagrams. Curve A: A. is an investment schedule and curve B is a consumption of fixed capital schedule. B. is an investment demand curve and curve B is an investment schedule. C. and curve B are totally unrelated. D. shifts to the left when curve B shifts upward.