D. By posting a well trained army throughout the empire
Answer:
Life at this time was by no means easy, or even sometimes pleasant, but people knew – or thought they knew – how the world worked and how to live in it; the plague would change all that and usher in a new understanding which found expression in movements such as the Protestant Reformation and the Renaissance.
Answer:
Mountains, deserts , and rivers.
Explanation:
such as mountains, deserts, rivers, and seas, made travel to and from China challenging. Other Features are Rivers, hills, plains, deserts, plateaus, and the Himalayan mountains.