Which of the following is right about Pit No. 3 ?
A.
It is located to the west of Pit No.1.
B.
In a 凹 shape, it is the smallest of all the pits, with only 68 warriors inside.
C.
A war chariot was placed at the front of the entrance.
D.
The formation resembles the headquarters of the left, central and right divisions of the entire army.