The Do It Yourself Hardware Store Is a Monopolistically Competitive

The Do It Yourself Hardware Store is a monopolistically competitive firm. Its marginal revenue curve

A) is identical to its demand curve.
B) lies below its demand curve intersecting the quantity axis at the same point at which the demand curve intersects it.
C) lies below its demand curve intersecting the quantity axis midway between the origin and the point at which the demand curve intersects it.
D) is below its demand curve if demand is elastic and above the demand curve if demand is inelastic.