In the Interior of Continents the Earth's Crust Is Typically

Multiple Choice

In the interior of continents the earth's crust is typically about 40km thick and the elevation is near sea level.In an area where the crust is 20km thick,isostasy would suggest the elevation in this area would be ________ unless the density changes from one area to the other.

A) below sea level
B) near sea level
C) slightly above sea level
D) high mountains