If $f(x) = \begin{cases} x, & x \le 0 \\ 0, & x > 0 \end{cases}$ then the function $f(x)$ at $x = 0$ is:

  • A
    not continuous and not differentiable
  • B
    not continuous but differentiable
  • C
    continuous but not differentiable
  • D
    continuous and differentiable

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