The Tigris River is found at Eastern Turkey.
The Euphrates River is found at Syria as it flows through Iraq.
It should be noted that the Euphrates River rises in Turkey and then flows across Syria through Iraq.
In this case, Tigris River is found at Eastern Turkey and the Euphrates River is found at Syria as it flows through Iraq.
The Tigris and the Euphrates flow from the mountains of Anatolia through Iraq. Therefore the mountains at letter D are the mountains of Anatolia.
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