The best and most correct answer among the choices provided by your question is the first choice or letter A. Promotion of trade throughout Asia was one of the policies implemented by Genghis Khan.
Genghis Khan, born Temüjin, was the founder and Great Khan of the Mongol Empire, which became the largest contiguous empire in history after his death.
I hope my answer has come to your help. Thank you for posting your question here in Brainly.