Prior to the destruction of the Second Temple in 70 CE, there were known Diaspora Jewish communities primarily in regions such as:
- Central Asia (especially in areas like Persia)
- Regions around the Mediterranean, including parts of Europe (though Great Britain had no significant Jewish communities until later).
- Communities in North Africa and the Middle East.
Great Britain and Japan did not have Jewish communities at that time. Southern Africa also did not have notable Jewish communities before the destruction of the Second Temple.
So, among the options provided, the most accurate would be Central Asia.