All of the following statements apply to a purely competitive market in the long run, except

A) in the long run, all inputs are variable in quantity.
B) firms can expand their plant capacities in the long run.
C) total fixed costs remain constant even when output expands in the long run.
D) firms may enter or leave the industry in the long run.

Plant Capacities

The maximum amount of products or services that a facility can produce over a given period of time under normal operating conditions.

Total Fixed Costs

The total of all expenses that stay the same, no matter the amount of goods or services produced by a company.

Inputs Variability

Inputs Variability refers to the fluctuations or variations in the factors of production used by firms in the production process, which can affect output levels and costs.