A.
The Qinghai Lake, surrounded by the Datong, the Riyue, and the Nansth Mountains, is in the northeast of Qinghai Province .
B.
The Qinghai Lake is located in the northeast of Qinghai Province. It is surrounded by the Datong, the Riyue, and the Nanshan Mountains .
C.
Located among the Datong, the Riyue, and the Nansth Mountains, t he Qinghai Lake is in the northeast of Qinghai Province .