Which of the following factors is not a barrier limiting the entry of potential competitors into a market?

In the above figure, below what minimum price will a perfectly competitive firm shut down rather than produce?

A) for any price less than $16 per unit B) for any price less than $12 per unit C) for any price less than $8 per unit D) for any price less than $4 per unit

Picture a linear downward-sloping demand curve. If the price continues to fall, price elasticity will

a. decrease b. increase c. remain unchanged d. approach infinity e. increase or decrease, depending on the character of the good