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Executive Order 13526  document is the original source for the categories of information that are eligible for classification.

What is Executive Order 13526?

On December 29, 2009, the President issued Executive Order (E.O.) 13526, prescribing a uniform system for classifying, safeguarding, and declassifying national security information, including information relating to defense against transnational terrorism.

Barack Obama signed Executive Order 13526 on December 29, 2009

The purpose of Executive Order 13526 establishes uniform information security requirements for the Executive Branch.

The categories of information are in Executive Order 13526 maintains the three long-standing classification levels, or classification markings, of top secret, secret, and confidential.

Therefore, we can conclude that the correct option is A.

Your question is incomplete, but most probably your full question was:

Which document is the original source for the categories of information that are eligible for classification?

A• Executive Order 13526

B• DoDM 5200.01, Vol. 2, Marking of Information

C• ISOO Classified National Security Information; Final Rule

D• ISOO Marking Classified National Security Information Booklet

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