If $f:[0,3] \rightarrow [0,3]$ is defined by $f(x) = \begin{cases} 1+x, & 0 \leq x \leq 2 \\ 3-x, & 2 < x \leq 3 \end{cases}$,then $f(f(x))$ is:

  • A
    Continuous at $x=1$
  • B
    Continuous at $x=2$
  • C
    Discontinuous at $x=1$ and $x=2$
  • D
    Continuous on $[0,3]$

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