Final answer:
In the AD-AS model, an unexpected decrease in the growth rate of the money supply will cause a decrease in output.
Step-by-step explanation:
In the AD-AS model, an unexpected decrease in the growth rate of the money supply will cause a decrease in output. This is because a decrease in the money supply will lead to a decrease in aggregate demand, which will result in a decrease in output and employment in the economy. This can be illustrated in the AD/AS diagram by showing a leftward shift of the AD curve.