The economist Irving Fisher explained the impact of a person's income size on his demand for interest. He showed that lower-income or poverty O a. increases impatience for present income enjoyment and lowers the rate of interest demanded. O b. reduces impatience for present income enjoyment and lowers the rate of interest demanded. Oc. reduces impatience for present income enjoyment and raises the rate of interest demanded. Od increases impatience for present income enjoyment and raises the rate of interest demanded