Dashti Qipchoq hududini aniqlang?

A) Sirdaryoning yuqori oqimi, Tyanshanning garbiy yon-bagridan Dnepr daryosining quyi oqimiga qadar
B) Sirdaryoing ortya oqimidan Tyanshanning grbiy yon bagridan Dnepr daryosining quyi oqimiga qadar
C) Sirdaryoning yuqori oqimi, Tyanshanning janubiy yon baridan Dnepr daryosigacha
D) Sirdaryoning quyi oqimi, Tyanshanning Janubiy yonbagridan Ural daryosi quyi oqimigacha