Topographically high-standing, mountainous areas generally ________.
A. are underlain by greater than average thicknesses of lower density, crustal rocks
B. subside rapidly to compensate for erosion
C. have thicker, higher density, mantle rocks beneath them at shallow depths
D. experience rapid erosion that thins the crust and causes the area to subside
Answer:A
Topographically high-standing, mountainous areas generally ________.
A. are underlain by greater than average thicknesses of lower density, crustal rocks B. subside rapidly to compensate for erosion C. have thicker, higher density, mantle rocks beneath them at shallow depths D. experience rapid erosion that thins the crust and causes the area to subside