C and D are the best answers out of the bunch
The Mongols were an empire that succeded in preservating their culture and their ways thanks to the comercial spirit they had.
They traveled all around Asia conquering territories and using their abilities for diffusing their culture by the means of selling and offering their products.
They were a culture opened in the sense that everyone could chose what to believe and how to live, this was a way of showing Asia how they lived and inspiring millions of people to be part of the culture.
This characteristic has made the mongols remain as a culture and it continues the enlargement of their followers.
The conquistadors came looking for gold and other valuable things.
