<span>The correct answer is C. the Cold War. It was after WW2 when Cold War just began and Berlin was split between the Eastern Bloc and the Western bloc. What happened was that the Soviets didn't want to allow Berlin to be supplied by the western forces so they put a blockade into the city and the US, working with Canadians and Brits, decided to send help using airplanes since it wasn't illegal and it couldn't be blocked.</span>
I believe the answer is A. That’s why exporting and importing exists.
Answer:
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<span>The petro-yuan is an instrument being issued by the Chinese government, allowing for the purchase of oil futures contracts denominated in Chinese yuan and backed in gold. The fact that China is the world's largest petroleum importer and is guaranteeing this currency to be exchangeable for gold means that the currency is likely to be considered seriously by many investors as a stable reserve currency. This is troubling for the U.S. because for decades the dollar has been seen as the world's primary reserve currency - but this new option gives an alternative to that status quo.</span>
