As the Time Frame Shifts from the Short Run to the Long

Multiple Choice

As the time frame shifts from the short run to the long run,what happens to producers who are subject to a binding price floor?

A) They are increasingly willing to substitute away from producing the good,and the supply curve becomes less elastic.
B) There are no changes,and their elasticity of supply remains unchanged.
C) They are increasingly willing to substitute away from producing the good,and the supply curve becomes more elastic.
D) They are less willing to substitute away from producing the good,and the supply curve becomes less elastic.
E) They are less willing to substitute away from the good,and the supply curve becomes more elastic.