For a Monopolistically Competitive Firm in Long-Run Equilibrium

For a monopolistically competitive firm in long-run equilibrium,

A) the demand curve must intersect the average total cost curve at the ATC curve minimum.
B) the demand curve must be tangent to the average total cost curve at the ATC curve minimum.
C) at the profit-maximizing quantity, the demand curve must intersect the average total cost curve.
D) at the profit-maximizing quantity, the demand curve must be tangent to the average total cost curve.