If a firm enjoys a revenue of $500 from two units of output and $600 from three units of output, then its marginal revenue must be rising

Of the following cancer patients, who is speculating?

A) The one who follows their doctor's advice and elects chemotherapy B) The one who goes against their doctor's advice and rejects chemotherapy C) The one who gets a second opinion, but not a third opinion D) All of the above. E) None of the above.

Year 2 nominal GDP is

A) $200. B) $270. C) $310. D) $390.