<span>Political appointees always rewarded an administrations supporters with contracts. What caused the failure of the civil service advisory board created in 1871</span>
The African kingdom that used seashells as it is form of currency is Mali Kingdom
<u><em>The Mir Space Station was in orbit for an astonishing 15 years, being the first modular space station public ally known!</em></u>
The Mir Station is no longer in orbit and was destroyed upon forced reentry by the Russians in an attempt to get rid of it, so it is NOT A.
Does the word "Mir" sound American to you? Well I certainly hope not, because it isn't, so it is NOT C.
If it isn't A, and it isn't C, it can't be all of the above, so it is NOT D.
So the answer is B by process of elimination!
Immigration is a widely practice all over the world and history of humanity, it is part of human culture to move around the world.
The roots of immigration of workers vary in time and places, so it is hard to identify who was to blame for the plight of immigrant workers, to define it we must consider each case and its parties.
Most of the time the plight of immigrant workers is the result of a combination of problems related to people country of origins and the country that receives them.
In the country of origins of immigrants we can blame things such as: bad government, environmental crisis as natural disasters, conflicts as wars or financial and economic problems. This all will motivate the immigration which can them leave workers in hard situations.
On the other side we might blame things in the country that receives the immigrant workers, as the government inaction or the inability to the country legally absorbs these workers, results of national policies for immigration and as well companies and other people who employs this immigrants taking advantage of this situation.
So due to this situation the workers will be prone to work in conditions that might be extremely harmful or danger. We can see as well people and companies that take advantage of this situation and pay low wages or don't respect work laws because this people aren't protect under this umbrella.
Because of no option many immigrant workers will submit themselves to harsh conditions of work in the country they are.
Because it could roll over bombed out landscapes and keep penetrating the opposing force. Hope that helped! ;)