Can these two countries gain from trading oil and fish oil? a. these countries can gain from trade because norway has an absolute advantage producing fish oil. b. these countries cannot gain from trade because neither has a comparative advantage producing either good. c. these countries cannot gain from trade because neither has an absolute advantage producing either good. d. these countries can gain from trade because their opportunity costs of producing each good are the same. e. these countries can gain from trade because the united kingdom has an absolute advantage producing oil.