What were the events/factors that facilitated the social mobilization that happened in the Soviet Union in the late 1980s?

Assignment 4

This assignment is based on reading by Sidney Tarrow “Political opportunities and constraints” you were assigned to read this week. Considering the reading answer the following questions:
▪ What does Tarrow mean by political opportunity structures?
▪ What were the events/factors that facilitated the that happened in the Soviet Union in
the late 1980s?
▪ How do these events relate to the five factors Tarrow discusses?