Answer:
The good choice is:
B. the right of President Nixon to withhold tapes of his private phone conversations.
Explanation:
President Richard Nixon was not willing to allow public access to the recordings of his private conversations on the phone or in the White House during some part of the Watergate scandal that shook his administration in 1972-1974. When the case reached the Supreme Court, the highest tribunal ordered the White House to disclose Nixon´s secret tapes. Nixon resigned on August 9, 1974.
