A rising rate of market interest would have which of the following impacts on a mortgage passthrough security $($MPT$)?($a$)$ Increase the market value of the MPT $($b$)$ Decrease the market value of the MPT $($c$)$ Increase or decrease, depending on whether the MPT was issued at a premium or a discount $($d$)$ The market rate of interest has no impact on the market value of a MPT