Which of the Following Describes a Way in Which Stalin's

Which of the following describes a way in which Stalin's "Great Terror" defeated its own purpose?

A) The effort to create a more unified socialist country cut the Soviet Union off from overseas outlets to spread revolution.
B) In trying to take direct control over economic and political life, Stalin managed to eliminate many of his most talented subordinates.
C) Speeding up the rate of industrialization created unemployment that even communism could not manage.
D) By eliminating his major political opponents, Stalin only increased opposition on the part of minor officials who previously supported him.
E) Stalin's actions galvanized opposition to his rule and led, in 1938, to his overthrow by Nikita Khrushchev.