Ice caps over Antarctica are on average 7 000 feet thick, or around 1 mile, so 1 miles is the correct answer, and the thickest are about 2 miles thick- so that's also a correct answer.
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Because there was a higher concentration of Jews in Poland than almost anywhere else.
The answer is A. A job , They were a lot of jobs that needed filled. Wanted immigrants to comeover to fill those jobs