Ecologists predict that the incidence of malaria will increase if global warming continues or if the use of pesticide...

I can understand the logic behind C and why it is correct. As an Econ major however, this answer bothers me because in practice it is not true (particularly regarding the statement "But if there is a decline in the demand for consumer goods, that will lead to higher interest rates"). In my studies, I have learned that a decrease in demand for consumer goods will lead to lowering of interest rates, in order to stimulate spending within an economy. This is at odds with the answer which argues the opposite; that a decrease will lead to higher rates. I initially skipped answer C because to me it didn't make sense. Then I chose it, realizing that purely from a logical standpoint it makes sense. Am I reading too much in to this? Will LSAT give questions that in practice will not make sense, even though logically correct?