Definition: This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
Input: Passage: The Fourteenth Amendment to the United States Constitution (Amendment XIV) is one of the post-Civil War amendments, intended to secure rights for former slaves. It includes the due process and equal protection clauses among others. The amendment introduces the concept of incorporation of all relevant federal rights against the states. While it has not been fully implemented, the doctrine of incorporation has been used to ensure, through the Due Process Clause and Privileges and Immunities Clause, the application of most of the rights enumerated in the Bill of Rights to the states. Question: What has the doctrine of incorporation been used to ensure?
Output:
application of most of the rights enumerated in the Bill of Rights to the states