Suppose an American worker can make 20 pairs of shoes or grow 100 apples per day. A Canadian worker, on the other hand, can produce 10 pairs of shoes or grow 20 apples per day. The opportunity cost of one pair of shoes for the United States is while the opportunity cost of one pair of shoes for Canada is ________ . ________! 0 2,000 apples; 200 apples 0 1/5 apple; 1/2 apple 0 100 apples; 20 apples 0 5 apples; 2 apples