A major characteristics of a firm operating at a long-run equilibrium position is that

Explanation

A major characteristic of a firm operating at a long-run equilibrium position is that all costs can be varied. In the long run, a firm has flexibility in adjusting its inputs and production level to optimize its operations.
In the long run, a firm can make adjustments to various factors of production, such as labor, capital, and technology. This flexibility allows the firm to change its costs according to the desired level of output. Fixed costs, such as rent for a facility, can be adjusted by choosing a different location or size of the facility. Variable costs, such as raw materials and labor, can also be adjusted by changing the quantity of inputs used.