The rule of the mongols had irrevocably changed the dynamics of existence in China.
Explanation:
Ming dynasty was founded after ousting the Mongols from their territory and as such had the massive task of rebuilding the identity of China from scratch and make it catch up with the world.
This is something they were able to achieve more or less.
This was done by the importance laid on the invigoration of trade routes by ship and also of art culture and literature.
The population had doubled in the time of the Ming rule in China despite the plague hitting the world.
It would be distance, I believe. But most of the time when there's an "All of the above" it's usually always right. So my belief it's either Distance or All Of The Above, Determining the context.
The Cuban Missile Crisis, October 1962. The Cuban Missile Crisis of October 1962 was a direct and dangerous confrontation between the United States and the Soviet Union during the Cold War and was the moment when the two superpowers came closest to nuclear conflict.