•The spread of the bubonic plague from central Asia into Europe decimated the populations but increased opportunities for the survivors.
•An enormous variety of new consumer goods, agriculture, weaponry, religion, and medical science became available in Europe.
• New diplomatic channels between Europe, Asia, and the Middle East were opened.
•Russia became unified for the first time.
Answer: He helped the whole country
The answer should be D). Hope this helps, and have a great night! <3