What Best Describes Why the Upper Part of the Mantle

Multiple Choice

What best describes why the upper part of the mantle, called the asthenosphere, is important in plate tectonics?

A) It is hot and plastic like, which allows the overlying plates to slide or move.
B) It is the source of metallic minerals that form valuable ore deposits within the plates.
C) It is the place where plates originate.
D) It is the source of carbon that gets transformed into oil and gas within the plates.
E) It is cold and dense, which keeps the oceans in the overlying plates relatively cool.