선생님 안녕하세요 Test Prep SAQ 1번 a) c)번을 써봤는데 확인 부탁드립니다 ^^ 부족한 부분이 있으면 말씀해주시면 감사하겠습니다!

1. a) Identify ONE specific historical example of a cultural exchange between nomads and non-nomads that occurred in the period before 1450.

Starting from the Song Dynasty, the Chinese used gunpowder weapons in the period before 1450, and as the Mongols started to expand their territory farther into Central Asia and even main Chinese territory, such Chinese cultural inventions spread into the Central Asian territory, such as the Ottoman Empire, including Chinese magnetic compass. 

     c) Explain ONE cross-cultural exchange that would challenge the assertion in the last sentence of the passage concerning the nomads' role in cross-regional exchanged before 1450. 

Although it is true that Central Asian nomads played a vital role in facilitating the cultural exchange between the West and East, the spread of the Bubonic Plague during the period before 1450 directly contributed to the population decrease in the Eurasian continent, reducing the extent of the cross-regional exchange and contact. As the Mongols expanded their empire massively via military might and political means, the spread of the Plague from China to the most of the continent was inevitable. 

B) For the period 1450-1750 C.E., identify ONE development that changed the role that Central Asian nomads played in cross-regional exchanged as described in the passage.

B)번은 '유럽 열강들이 overseas exploration을 통해 지리적 이점을 차지한 것에 비해서 Gunpowder empires는 상대적으로 약해졌다' 라는 내용 외에는 뭐가 있을까요? 

그리고

4.

B) Explain ONE way that, despite economic change, traditional elites remained powerful in the period 1750-1900

이 문제에서는 러시아에서는 산업혁명이 진행됨으로 인해 새로운 사회적 계층이 상대적인 사회적 지위를 얻게 되었으나 차르 니콜라스 2세와 그의 가족이 19세기 후반까지 막강한 권력을 가졌었다..이런걸 써도 점수를 받을 수 있을까요?