$2 \log _{10} 5 + \log _{10} 8 - \frac{1}{2} \log _{10} 4 = ?$

  • A
    $2$
  • B
    $4$
  • C
    $2 + 2 \log _{10} 2$
  • D
    $4 - 4 \log _{10} 2$

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