Pretty sure the answer is China and Egypt
This immigration law slowed down immigration to America.
The Guptas controlled northern India and received tribute from the Vakatakas in central India, but never expanded into the south. The Maurya empire was governed by powerful emperors who established an elaborate bureaucracy, levied extensive taxes and exercised direct control over the villages within its territories.
Hope this helps!
I think the answer is b though I’m not completely sure. C and D are the kinda screwballs and so it left us with a and b and out of those two I doubt nationalism was in reference to have country rivalries. So B is the most sensible answer