What Is the Source of the Nuclear Threat in the Russian

What is the source of the nuclear threat in the Russian Domain?

A) The Soviet Union had aggressive nuclear weapons and energy programs.
B) Nuclear fallout tests were conducted in the atmosphere.
C) There are unregulated nuclear waste dumps.
D) The USSR had nuclear weapons and power plants; nuclear fallout tests were conducted in the atmosphere; and nuclear waste dumps were unregulated.
E) The USSR had nuclear weapons and power plants; and nuclear waste dumps were unregulated.