Which of these was President Lincoln's central goal during the Civil War?

B. To preserve the union

Explanation:

The main goal of Abraham Lincoln on the Civil War was to preserve the Union, during his campaign he stated that slavery shouldn't be expanded in the United States, meaning that new states would be added as free states, the end of slavery became a goal during the Civil War.

shang dynasty

western zhou (ca. 1046-771 bce)

eastern zhou (ca. 771-256 bce)

there were abundant sources of fuel nearby