Classify each of the following as true or false. If false, show a counterexample:
A$|-x| = |x|$
B$|x - y| = |y - x|$
C$|-x - y| = |x + y|$
A$|-x| = |x|$
B$|x - y| = |y - x|$
C$|-x - y| = |x + y|$