Answer: C. occurs when aggregate planned expenditure exceeds real GDP, so firms increase production and real GDP increases
Step-by-step explanation:
When the Aggregate expenditure which is also known as Aggregate demand, exceeds the real GDP, it means that there is more demand for goods in the economy than the economy has currently produced.
Producers would therefore increase their production level in order to meet up with the new demand and return to a level of inventory that they are comfortable with. This increased production was not planned so any inventory it yields is unplanned as well.