<span>Left
1.The country is hit by a
natural disaster that
destroys its infrastructure.
</span><span>2.There is an acute shortage
of teachers in several of the
country’s states.
Right
</span><span>1.The government starts 50
new medical clinics in rural
areas.
</span><span>2.Seven computer hardware
companies set up new
manufacturing units in the
country.</span>
The Qin unified China, creating the first dynasty ruled by the first emperor Qin Shi Huang. Also the Qin created of the Great Wall and a Terracotta army.
In history such as World History? You should be able to distinguish the trends and differences in different periods say "Period 1 vs. Period 2" where each period represents a different range of years (in AP World History I learned it with 6 periods but it varies from year to year of when it is taught)
The correct answer is - E.) to increase national sovereignty.
By cooperation on regional or global level the states do not, and can not really do anything about increasing the national sovereignty. The reason for that is that the national sovereignty is the matter of the state itself, its politics, policies, and handling of the situations in the country. The other countries with whom the state cooperates have nothing to do with it, nor it is their place to interfere in the national sovereignty of the other states, be it friendly states or not.