If $200 \text{ MeV}$ of energy is released in the fission of one nucleus of ${ }_{92}^{235} \text{U}$,then the number of nuclei that must undergo fission to release an energy of $1000 \text{ J}$ is

  • A
    $3.125 \times 10^{13}$
  • B
    $6.25 \times 10^{13}$
  • C
    $12.5 \times 10^{13}$
  • D
    $3.125 \times 10^{14}$

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