Categories Economics uppose the demand for good Z goes up when the price of good Y goes down. We can saythat goods Z and Y are Post author By esimpk Post date June 17, 2021 A. perfect substitutes. B. unrelated goods. C. complements. D. substitutes ← Suppose the demand for good Z goes up when the price of good Y goes down. We can saythat goods Z and Y are → If the demand for coffee decreases as income decreases, coffee is