At the Point Where the Demand and Supply Curves for a Product

At the point where the demand and supply curves for a product intersect:

A) the "selling price" and the "buying price" need not to be equal
B) the market may, or may not, be in equilibrium
C) either a shortage or a surplus of the product might exist, depending upon the degree of competition
D) the quantity that consumers want to purchase and the amount producers choose to sell are the same
E) price will be pushed either up or down, depending on whether there is a shortage or surplus