Let $f(x) = \begin{cases} 0, & \text{if } -1 \leq x < 0 \\ 1, & \text{if } x = 0 \\ 2, & \text{if } 0 < x \leq 1 \end{cases}$ and let $F(x) = \int_{-1}^{x} f(t) \, dt, -1 \leq x \leq 1$. Then:

  • A
    $F$ is a continuous function in $[-1, 1]$
  • B
    $F$ is a discontinuous function in $[-1, 1]$
  • C
    $F'(x)$ exists at $x = 0$
  • D
    $F'(x)$ does not exist at $x = 0$

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