Answer: create oxygen as a by-product
D) there was a great diversity of skill and cultures in the labor force didn't you forget how AMerica's economy made a diversity.
I think it's actually, D) The South had more effective military commanders.
Letters A and C. Let us understand why:
European maritime expansion has created new trade routes, connecting many parts of the world, but commercial interest was the main reason.
In the European markets, which flourished during the Late Middle Ages, the sale of spices and other Oriental goods provided very high profits to merchants. Silk fabrics, porcelains and a number of condiments, such as cloves, pepper, and cinnamon, used for food preservation, met a large number of buyers.
