Answer:
Option D=> The Fourth Amendment.
Explanation:
The Fourth Amendment is an amendment act that is meant to protect people's rights. The statement of the the Fourth Amendment is quoted below;
''The right of the people to be secure in their persons, houses, papers and effects, against unreasonable searches and seizures, Shall not be violated and no Warrant Shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.''
During the time Edward Snowden was working with the Central Intelligence Agency, he revealed some top secrets that has to do with national security and one of what he revealed is the one given in the question.
What the National Security Agency (NSA) did was unconstitutional because of the Fourth Amendment that is to say people have the rights to their privacy and the right to know if infomation are being collected with regards to their privacy.