D. object of a preposition is the correct answer.
The the beginning of the Civil War, President Lincoln ordered the U.S. Navy to place a blockade along almost 3,500 miles of Atlantic Coastline. This was so the Union could stop them from importing products in and from exporting their own good out of the country. Though many smaller Confederate shops were able to get out of the ports, they only had a little bit of goods, and the South needed much more to support their economy.
Answer:
Not strong, weak, thin, breakable, frail, shaky, unstable.
