The answer you are looking for is under option A
Kievan Rus was a loose federation of East Slavic and Finnic peoples in Europe from the late ... He extended his control from Novgorod south along the Dnieper river valley to protect trade from Khazar incursions ... In the south, in the area around Kiev, were the Poliane, a group of Slavicized tribes with Iranian origins
To survive they have made modified leaves into spines to prevent excessive loss of water from the plant body and deep roots to get to a water source.
