At a Given Output Level, a Monopolist Earns a Profit

At a given output level, a monopolist earns a profit only if the

A) slope of its TR curve exceeds the slope of his or her TC curve.
B) height of its MR curve exceeds the height of his or her MC curve.
C) height of its demand curve exceeds the height of his or her MR curve.
D) height of its demand curve exceeds the height of his or her ATC curve.