Your answer is A I remeberthis story quite well. :)
I believe that A could be correct. The problem with C is that comma. Again, I'm not sure. You should wait for another person to help also. (I'm better at math.. Not English)
<em>I hope this helps!~
I will find someone else to help! :)</em>
Circle probably not right
Answer:
Unfair treatment and cheap labor made it nearly impossible for immigrants to achieve the American dream.