Former communist nations began to join the european union in
a.2000
b.2002
c.2004
d.2006

The correct answer is C.

In 2004 ten countries joined the European Union: Cyprus, Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia and Slovenia.  Some of these countries, such as Latvia or Lithuania were formerly communist nations, which also were under the influence of the URSS during the Cold War era. It was the first time that former communist countries were accepted in the EU.

because it !

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.