Scientists have direct evidence of the Earth's structure to
A) the inner core.
B) the upper mantle (~250 km (155 mi)).
C) about 2 km (1.2 mi) from the surface.
D) 10 km (6 mi) from the surface, based on the deepest well shaft.

Question

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The Answer of Scientists have direct evidence of the Earth's structure to
A) the inner core.
B) the upper mantle (~250 km (155 mi)).
C) about 2 km (1.2 mi) from the surface.
D) 10 km (6 mi) from the surface, based on the deepest well shaft.

Scientists Have Direct Evidence of the Earth's Structure to