Which of the following is not a characteristic of a monopolistically competitive firm in long-run equilibrium?

Suppose we observe people buying more of a good even though its price has risen. What would an economist conclude?

A) Impossible! We will never observe prices and quantity simultaneously rising in the real world. B) The demand curve for the good must be upward-sloping. C) The law of demand doesn't hold. D) The demand curve has shifted to the right. E) Consumption increasing as prices increase only occurs when a good is needed for survival.

The Department of Justice has challenged the merger of two firms, and the case has ended up in the Supreme Court. The two firms argue that they will not use their monopoly power to raise prices or to cut output. Under what judicial standard would their merger be allowed, and under what judicial standard would their merger be disallowed?