Which document makes birthright citizenship possible?

A. Oath of Allegiance
B. United States Citizenship and Immigration Service.
C. the Magna Carta
D. the U.S. Constitution

D. the U.S. Constitution

The document that makes birthright citizenship possible is the D. the U.S. Constitution.

The correct answer is D. the U.S. Constitution.

To find the answer to this question, you can start by understanding what birthright citizenship is. Birthright citizenship is the concept that individuals are granted citizenship in a country by virtue of being born in that country, regardless of their parents' citizenship.

Once you know what birthright citizenship is, you may recall that the United States follows the principle of birthright citizenship. To identify the document that establishes birthright citizenship in the United States, you can consider the various options provided in the question.

A. The Oath of Allegiance is a pledge that individuals take when they become U.S. citizens, but it does not establish birthright citizenship.

B. The United States Citizenship and Immigration Service (USCIS) is an agency responsible for immigration and naturalization services, but it does not define birthright citizenship.

C. The Magna Carta is an influential historical document that established certain rights and limits on government powers in England, but it is not relevant to birthright citizenship in the United States.

D. The U.S. Constitution, on the other hand, is the fundamental law of the United States. It outlines the organization, powers, and limitations of the government, as well as the rights and freedoms of its citizens. The 14th Amendment of the U.S. Constitution, ratified in 1868, contains the Citizenship Clause, which states that all persons born or naturalized in the United States, and subject to its jurisdiction, are citizens of the United States and of the state in which they reside. This clause establishes birthright citizenship in the United States.

Therefore, the correct answer is D. the U.S. Constitution.