Answer:
The correct answer is option E.
Step-by-step explanation:
A company incurs the rent of a store. In the short run, this rent is considered a fixed cost. In the long run, though, this cost will be included in the variable cost. This is because, in the long run, all costs are variable, all costs can be varied.
While in the short run some costs cannot be varied because the short run is too short to vary these costs.