The answer is a) abolitionism
Answer:
The 14th Amendment made the newly freed slaves citizens.
Explanation: The 14th Amendment was part of the Reconstruction Amendments.
The Schlieffen Plan's strategy required that France be defeated swiftly – but this didn't happen. That failure led to sustained trench warfare on the Western Front. In those grim battles of attrition, such as the Battle of the Somme and the Battle of Verdun, Allied forces ultimately outnumbered the Germans