A: perestroika means openness thus meaning the people were allowed to be open about how they felt
The correct answer is: hierarchical with a defined class structure.
Explanation
Hierarchical with a defined class is the option that best describes Songhai's society.
Moreover, a hierarchy refers to a way of categorization of people in a society based on income, power, education, race or dominance over other people, in which the members who are above are superior or can rule those below them. In this case, Songhai society used to work in that way.
Answer:social and economic changes that mark the transition from a stable agricultural and commercial society to a modern industrial society relying on complex machinery rather than tools.
Explanation: