Look closely at this map. In ancient times, Greece and Persia (present-day
Iran) fought to control the Dardanelles and Bosphorus straits. Russia fought
Turkey over these straits in the 1800s, and the Allies (France, Russia, and the
United Kingdom) invaded them during World War I.
Which of the following is the most likely reason so many powers have
considered these straits worth fighting over?
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A. The straits lie at the western end of the Silk Road.
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B. The straits control access to ports in the Black Sea.
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C. The straits separate Muslim and Christian regions.
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D. The straits are near the ancient city of Troy.