[UCONN 1071Q] 1 2 3 -1 1 2 -1 -2 3 Using the graph of f(x) above, for which x-value(s) does f'(x) not exist? (A) x = 1 (B) x = 0 and x = 1 (C) x = 2 (D) x = 1 and x = 2 (E) x = 0 and x = 2