1. Earth's crust and that portion of the uppermost mantle directly below the crust extends down up to 70 km. |
2. Lithosphere varies in thickness from only a few kilometers in oceans. |
A) Only 1 is correct
B) Only 2 is correct
C) Both 1 and 2 are correct
D) Neither 1 nor 2 is correct
Correct Answer: C
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