The long run is a planning period:

A) over which a firm can consider all inputs as variable.
B) of at least five years.
C) of more than six months.
D) of six months to five years.

Long Run

An economic phase where all production elements and expenses can adjust completely, adapting to changes due to their variable nature.

Variable Inputs

Production factors that can be adjusted in the short term to change the level of output, such as labor and raw materials.