"This Infamous Decision of the Slaveholding Wing of the Supreme

"This infamous decision of the Slaveholding wing of the Supreme Court maintains that slaves are within the contemplation of the Constitution of the United States,property...The Constitution,as well as the Declaration of Independence,and the sentiments of the founders of the Republic,give us a platform broad enough to support the most comprehensive plans for the freedom and elevation of all the people of this country."
Frederick Douglass,May 1857
-Which of the following later historical developments aided blacks in gaining their freedom and liberty?

A) The adoption of a proclamation of emancipation
B) The approval of Amendments to the Constitution
C) The rewriting of the Declaration of Independence
D) The successful defense of black rights by the Supreme Court