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3 c

4 a

Explanation:

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3. Activities of the Underground Railroad.

4. The Northern Economy was mainly industrial, while the South was almost exclusively agricultural.

answer; ///i believe that it means; ///you pay no customs duty on the chocolates;

6.3%

explanation:

the acceptance rate for yale university is 6.3%. this means that only 6 percent of people who apply actually get accepted!