Option C
The nature of a firm's cost (fixed or variable) depends on the time horizon under consideration.
Explanation:
Fixed costs are autonomous of the characteristic of goods or services offered. Fixed costs (also related to as overhead costs) manage to be time-related costs including wages or periodically rental fees. Fixed costs are simply short term and do shift over time.
The long-run is enough time of all short-run information that are fixed to enhance variable. Fixed cost are hardly fixed about the amount of production for a particular period. variable costs can be changed in real-time to market need for the product.
