Final answer:
The Civil War led to the passage of the 13th, 14th, and 15th amendments in the United States, which respectively abolished slavery, granted citizenship and equal protection under the law to all individuals including former slaves, and protected the right to vote free of racial discrimination.
Step-by-step explanation:
The event in American history that led to the passage of the 13th, 14th, and 15th amendments is b) The Civil War. The end of the Civil War caused a profound shift in the societal and political structure of the United States, leading to the ratification of these notable amendments. Each of the amendments had significant repercussions. The Thirteenth Amendment abolished slavery, making it constitutionally illegal. After the abolition of slavery, the Fourteenth Amendment was ratified, granting citizenship to all person born or naturalized in the United States, including former slaves, and ensuring all citizens are given equal protection under the law. The Fifteenth Amendment safeguarded the right to vote, free from racial discrimination.
Learn more about Civil War and Amendments