Answer:
C: Irrigation systems
Explanation:
A can help farm, but it doesn't give the ability to since water would be needed in the desert.
B is more for hunting and fighting, not farming.
C gives water which makes them able to farm in the desert.
D doesn't change much, as in, they'd still need water.
i think a b c are the correct answers
Of all the Ethnic groups in Russia and the Eurasian republics, the B) Slavs are most numerous.
Did it give you a choice or are you asking for one?
