All of the following are reasons that trade between nations is beneficial EXCEPT

The above figure definitely shows

A) a long-run equilibrium for a monopolistically competitive firm. B) an industry with few firms. C) a long-run equilibrium for a perfectly competitive firm. D) a long-run equilibrium for a perfectly competitive market. E) a short-run equilibrium for a monopoly.

In the above figure, the price paid by the buyer before the tax is ________ per compact disc, and the price paid by the buyer after the tax is ________ per compact disc

A) $20; $20 B) $20; $30 C) $30; $20 D) $30; $30