thE "wigwAm" is mEntionED in linE 5 As An ExAmplE oF A BuilDing Form______.
A．mADE into A hillsiDE
B．morE AmBitious thAn A Dugout
C．without insiDE wAlls thAt might hElp to insulAtE
D．possiBly DEvElopED From thosE oF thE EArliEr inhABitAnts