When peoples are isolated … they develop in their own ways. Tibet is an example. For thousands of years, Tibetans were isolated on
the vast Tibetan plateau. As a result, they developed a distinct language
and culture, as well as religious beliefs and government. According to the source, which of the following has contributed most to Tibet's sense of nationalism?

Question 4 options:

a. Politics

b. Religion

c. Geography

d. Language