In its 1857 Dred Scott v. Sandford decision, the Supreme Court ruled that African Americans were not United States citizens. What action
was taken after the Civil War in response to this Supreme Court decision?
O Congress impeached the justices who made the ruling.
O The Supreme Court's power of judicial review was limited.
The 14th Amendment recognized the citizenship of African Americans.
Justices considered court decisions made before the Civil War to be invalid.

The 14th Amendment was passed after the Civil War in response to the Dred Scott v. Sandford decision, recognizing the citizenship of African Americans.

Explanation:

After the Civil War, the 14th Amendment was enacted in response to the Supreme Court's Dred Scott v. Sandford decision. The 14th Amendment recognized the citizenship of African Americans, granting them equal protection under the law and overturning the Court's ruling.

Learn more about Dred Scott Decision and the 14th Amendment here:

https://brainly.com/question/29773681