The correct answers are B) It threatens the nations of Iran and Pakistan. C) It threatens the world’s oil supply.
According to President Carter, the Soviet Union’s invasion of Afghanistan was a threat to stability because "It threatens the nations of Iran and Pakistan" and "it threatens the world’s oil supply."
The troops of the Soviet Union invaded Afghanistan in December 1979. They stayed there until February 1989, 10 long years in the region! The Soviet Union sent its troops to support the government of Afghanistan in fighting insurgents and rebel groups such as the mujahideen that reived the support of the United States. US President Jimmy Carter considered that the Soviet Union’s invasion of Afghanistan was a threat to stability because it threatened Iran and Pakistan, and it threatened the world’s oil supply.
It was the "west" that was the region of the United States that experienced the greatest increase in population by percentage from 2000 to 2004, since many people found it more affordable to move.