The answer is addressed free speech and student's rights.
The movement was called Free Speech Movement (FSM), the movement began in 1964, when students at the University of California, Berkeley protested a ban on on-campus political activities. The protest was led by several students, who also demanded their right to free speech and academic freedom. The phenomenon of the movement was inspired first by the struggle for civil rights and later fueled by opposition to the Vietnam War.
The main reason why the President would wanted to appoint a judge who is acceptable to the legislative branch is that judges need to be confirmed by the Senate in order to be fully appointed.
The correct answer would be
C. Tests can be replaced as the Court redefines limits on civil liberties.
I hope this helped you out!! Have a happy Thanksgiving! :)