Political instability is a deterrent to long-term private investment

Just like other scientific models, economic models simplify reality using

Figure 10-16

With the passage of time, which of the following will help direct this economy in toward its potential long-run rate of output?
a.
lower interest rates that will stimulate AD and lower resource prices that will increase SRAS
b.
higher interest rates that will reduce aggregate demand and higher resource prices that will reduce SRAS
c.
lower interest rates and higher resource prices, both of which will stimulate aggregate demand
d.
higher interest rates that will reduce SRAS and lower resource prices that will stimulate aggregate demand