In Contrast to the Solid Outer Mantle,parts of the Central

Multiple Choice

In contrast to the solid outer mantle,parts of the central regions of the Earth's interior are thought to be fluid.Which of the following supports this idea?

A) P seismic waves cannot pass through those regions.
B) S seismic waves cannot pass through those regions.
C) Neither P nor S seismic waves can pass through those regions.
D) Both P and S seismic waves easily pass through those regions.