For what reasons did some Americans oppose slavery?

Some Northern Americans feared that freed slaves would move north and take jobs from white workers. They also believed that freed slaves would be willing to take lower wages in order to get work in the North.

Explanation:

(a).national trade check first good luck

muslims have taken his goods and products to different parts of asia an indonesia. sometimes just traveled and trade, but in other occasions, stayed in the place and made a living.

trade was the key for muslims economies to prosper. their commerce routes reached far places like malaysia and java in the 11th century.

another important factor for prosperity was that muslim states served as the middle point for european traders.

they used to travel by land but sailing the seas -the indian ocean- really increase the exportation of products.