​Documents Leaked by Edward Snowden Showed That the National Security

​Documents leaked by Edward Snowden showed that the National Security Agency had

A) engaged in excessive surveillance of foreign nationals' phone calls.
B) given American citizens' phone call records to foreign governments.
C) failed to adequately keep track of phone conversations in the aftermath of the September 11, 2001 attacks.
D) unsuccessfully attempted to protect the privacy of Americans.
E) collected data on domestic phone conversations of ordinary Americans.