If ${\log _7}2 = m,$ then ${\log _{49}}28$ is equal to

  • A

    $2\,(1 + 2m)$

  • B

    ${{1 + 2m} \over 2}$

  • C

    ${2 \over {1 + 2m}}$

  • D

    $1 + m$

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