What was one important thing that Abraham Lincoln did?

A. vetoed the 13th amendment

B. invented the cotton gin

C. wrote the Declaration of Independence

D. saved (or preserved) the Unio

D

Explanation:

Saved or preserved the union(btw Lincoln supported white superiority)

D

Explanation:

Abraham Lincoln was president of the United States from 1861 to 1865, and led the nation during the Civil War. Lincoln thought the separation of the southern (Confederate) states was unconstitutional, and he wanted to preserve the Union. In 1863, during the Civil War, he issued the Emancipation Proclamation

so they can defeat there oppenent

b, the anti immigrant fervor