The ratio of the maximum and minimum magnitudes of the resultant of two vectors $\vec{a}$ and $\vec{b}$ is $3 : 1$. Then $|\vec{a}|$ is equal to:

  • A
    $|\vec{b}|$
  • B
    $2|\vec{b}|$
  • C
    $3|\vec{b}|$
  • D
    $4|\vec{b}|$

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