f(x) = 1/x - 1/(x - 2) . Identify the domain of f.
a) (-[infinity], 0) U (0, 2) U (2, [infinity])
b) (-[infinity], 0] U [2, [infinity])
c) (-[infinity], 0) U (2, [infinity])
d) (-[infinity], 0) U (0, 2) U (2, [infinity])