Let $f(x)$ be defined in $[-2, 2]$ by
$f(x) = \begin{cases} \max(4 - x^2, 1 + x^2), & -2 < x < 0 \\ \min(4 - x^2, 1 + x^2), & 0 < x < 2 \end{cases}$
Then $f(x)$:

  • A
    is continuous at all points
  • B
    has a point of discontinuity
  • C
    is not differentiable at more than one point
  • D
    $(B)$ or $(C)$ both

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