Virginiaís blue ridge mountains were once among the tallest in the world, similar in altitude to the himalayas of today. this would still be the case if not for the process of
a)
erosion.
b)
folding.
eliminate
c)
volcanism.
d)
metamorphism.

The best and most correct answer among the choices provided by your question is the first choice or letter A.

The Blue Ridge Mountains would be still be among the world's tallest if not for erosion.
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