2. The Earth's crust is best described like this:
a. It is extremely viscous. It's density increases
with depth which extends almost halfway to the
center of the Earth
b. It is just over half of the Earth's diameter, the
outer part of which is liguid and the inner part of
which is solid
c. It is a thin layer of rock
d. It is extremely viscous - density decreases with
depth and which extends almost halfway to the
center of the Earth​