The case was initiated by Austrian activist Max Schrems, who claims that techniques used by the US National Security Agency (NSA) -- as revealed by whistleblower Edward Snowden -- meant that the privacy of his user data could not be guaranteed once it had been transferred across the Atlantic.
Utilize the input text as a context reference, choose the right relationship between 'Edward Snowden' and 'National Security Agency' from the options.
Options: parent organization, business division, employer, headquarters location