The centroid of a tetrahedron with vertices at $A(-1, 2, 3)$,$B(3, -2, 1)$,$C(2, 1, 3)$,and $D(-1, -2, 4)$ is:

  • A
    $\left(\frac{3}{4}, \frac{-1}{4}, \frac{11}{4}\right)$
  • B
    $\left(\frac{5}{4}, \frac{-3}{4}, \frac{7}{4}\right)$
  • C
    $\left(\frac{-3}{4}, \frac{-1}{4}, \frac{11}{4}\right)$
  • D
    $\left(\frac{-5}{4}, \frac{-3}{4}, \frac{-7}{4}\right)$

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