How did british colonial rulers treat the many ethnic groups of myanmar during british rule in the 1800s?
they forced all groups to speak the burmese language.
they attempted to create a national identity.
they divided the groups into separate political units.
they allowed the groups to remain autonomous.

The British colonial rulers had a different approach in Tackling Myanmar. They created borders and gave native people a political identity. This enforced a felling of "nativeness" in the people and people who did not like the foreigners coming from India, China etc., became happy due to these borders. So, the correct answer is B.