If the equation whose roots are $p$ times the roots of the equation $x^4-2ax^3+4bx^2+8ax+16=0$ is a reciprocal equation,then $|p|=$ :

  • A
    $\frac{1}{3}$
  • B
    $\frac{1}{2}$
  • C
    $2$
  • D
    $3$

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