China is an example of a society that is culturally separate from other nations because
a. its language is difficult to learn, which separates it from other nations.
b. it is not a very technologically advanced society and has poor communication networks.
c.
its government wants to control outside influences that may affect its people.
d. it is located in a remote region of the world that does not have access to transportation.

The answer is A.

Explanation:

Mandarin (it is what we understand by Chinese language in a simplified way) is actually a very difficult tongue. It has a different writing system and it transmits ideas in a a very different way from what we do in Western languages. There are no common roots between Indo-European languages and Mandarin, or broadly, the numerous languages of China. Except for neighbors such as Japan, Korea and Vietnam that were heavily influence by Chinese culture, this has meant an obstacle for communication with other peoples.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.

its many islands, high mountains, and remote peninsulas isolated population centers.