More effective than the other candidates, he would have been a great president when it came to negotiating with other countries. (if you talking about Bernie Sanders)
I believe A, hope I could help
The belief was that there was a distinct order of living things: Chinese, barbarians, and beasts. That's why they made all foreign diplomats bow down to the Emperor and why they completely isolated the country to show that it's self sufficient.
The answer is D.
