The correct answer is C) Pax Mongolica.
The Mongols made trade and travel safe during the Pax Mongolica.
Pax Mongolica meaning is Peace in Mongolia and the Eurasian territory conquered by the Mongols during the 13th and 14th centuries AD. This was a peaceful time that served to improve communications and trade among the nations, basically in what was known the Silk Road routes. Trade was an important element to the exchange of products and culture between nations.
The other options of the question are, a) Mongol Intervention, b) Golden Age, and d) Mongol Restoration.
