If $\frac{\log x}{b-c}=\frac{\log y}{c-a}=\frac{\log z}{a-b}$,then the value of $x^{b+c} \cdot y^{c+a} \cdot z^{a+b}$ is

  • A
    $1$
  • B
    $2$
  • C
    $0$
  • D
    $-1$

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