I believe the answer is the second option.
Your answers are Gana, Mali, and Songhai.
Answer:
Christopher Columbus may have stumbled upon the Americas, but his accidental discovery has changed the course of history.
The Italian explorer's travels bridged the gap between Europe and the New World, but his curiosity also marked the beginning of centuries of transatlantic colonization.
The correct answer is: -With nuclear weapons, it would be too destructive
In essence, an open war between the two nations would be a nuclear war and no one could stomach that instant destruction.