Read the following paragraphs and then answer the questions“Monitoring the global situation helps us to mitigate exchange rate risk,” Li said. He remembers last year when the Russian economy shrank because of Western sanctions over the Ukraine crisis. “We shifted our major target market from Russia to Europe before the rouble fell sharply. Russian customers used to contribute to 60 percent of our sales volume, but now they only make up to 5 percent,” he added.1). What had DIRECTLY caused the Russian customers contribution to drop?
A. exchange rate
B. major target shift
C. foreign policy
D. Ukraine crisis