Which of the following best explains why the older fold mountains are much lower and less rugged than the newer ones?
-
A.
The newer fold mountains are situated in areas of active earth movements -
B.
The effects of earth movements resulting in mountain building are much greater nowadays than they were during the period of folding -
C.
The newer fold mountains, in contrast to the older ones, are made up of more resistance rocks -
D.
the older fold mountains have been subjectd to the forces of denudation for longer, geological periods -
E.
Most of the newer fold mountains are situated in the interior parts of continents where they are free from constant sea erosion