Which of the following is an example of a voluntary export restraint?( ) A: China imposes a 100% tariff on Australian apples. B: China restricts the import of Japanese cars to 10,000 units a year. C: Japan decides to only export 10,000 cars toChinaon complaints from the Chinese government that Chinese consumers are buying Japanese cars over Chinese cars. D: China has a comparative advantage in the production of wheat so it buys no wheat fromAustralia.