Answer:
The correct answer is a. an increase in the money supply lowers the equilibrium rate of interest.
Step-by-step explanation:
The preference for liquidity is a recurring expression in the study of economics, especially important in Keynesian theory and which assumes that people consider it better to have their savings in liquid form, that is, as money.
This concept, very recurrent in macroeconomics, assumes the existence of an outstanding trend in human and rational behavior whereby individuals prefer to have their assets in an accessible and liquid way compared to other possibilities. Originally, the definition of liquidity preference was coined by Keynes when explaining the concept of monetary demand and its mode of action.
This theory suggests that there is a direct relationship between interest rates or rates and people's preferences in terms of liquidity, since both keeping money effectively and not doing so carry certain costs for them. In other words, saving money can translate into financial gain.
For Keynes, there were three reasons why the individuals who make up the money demand opt for liquidity and money: transactions, caution and speculation.