Let $f: R \rightarrow (0,1)$ be a continuous function. Then,which of the following function$(s)$ has(have) the value zero at some point in the interval $(0,1)$?

  • A
    $B, D$
  • B
    $B, A$
  • C
    $B, C$
  • D
    $B, D, C$

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