Labor Is Typically Assumed to Be the Only Variable Input

Multiple Choice

Labor is typically assumed to be the only variable input in very short-run production systems, and the number of variable inputs increases as we lengthen our planning horizon from short run to long run. What happens to the labor demand curve as we move from short run to long run?

A) Demand curve becomes less elastic.
B) Demand curve elasticity does not change.
C) Demand curve becomes more elastic.
D) Demand curve becomes upward sloping.