The Following Graph (A)represents the Cost Curves for a Representative

The following graph (A) represents the cost curves for a representative firm in a perfectly competitive market.The market demand is shown in graph (B) :

-Refer to the above graph to answer this question.Suppose that the market demand were to increase by 2,000 units.What would be the new equilibrium price and quantity in the market?

A) $50 and 5,000.
B) $60 and 4,500.
C) $60 and 6,000.
D) $70 and 4,000.
E) $80 and 6,000.