For the chemical reaction $A + 2B \to 3C$,which of the following expressions correctly represents the rate of reaction?

  • A
    $-\frac{d[A]}{dt} = -\frac{1}{2} \frac{d[B]}{dt} = -\frac{1}{3} \frac{d[C]}{dt}$
  • B
    $-\frac{d[A]}{dt} = -\frac{1}{2} \frac{d[B]}{dt} = \frac{1}{3} \frac{d[C]}{dt}$
  • C
    $\frac{d[A]}{dt} = \frac{1}{2} \frac{d[B]}{dt} = \frac{1}{3} \frac{d[C]}{dt}$
  • D
    $-\frac{d[A]}{dt} = 2 \frac{d[B]}{dt} = 3 \frac{d[C]}{dt}$

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