The Mantle Extends from < 100 Km to About ________
The Mantle extends from < 100 km to about ________ and is bounded at both its top and bottom by ________.
A)600 km, layers of molten rock
B)2900 km, layers of markedly different chemical composition
C)290 km, the asthenosphere
D)2900 km, material of identical composition but contrasting temperature