I think 17 years is right but i’m not sure
Answer:
I don't know but im pretty sure its either C or B goodluck
The asthenoshere is a highly viscous, mechanically weak, ductile region of the upper mantle of Earth. Parts of it are made from rock melt.
The flowing asthenosphere carries the lithoshpere of the Earth, including the continents on its back.
Can predict volcanic eruptions as long as adequate resources are available