The blockade was supposed to prevent the South from getting resources and support from other countries who would support it such as those in Europe who were ready to recognize it as independent and help it if it meant that in the long run it would help them by weakening the Union.
Answer
B. They left carvings behind.
Explanation
What remains of their architecture and art, including stone carvings and inscriptions on their buildings and monuments.
Yes they are on the upper and lower half's of the world
