A \( \left(\frac{\text{GMT}^{-2}}{4\pi^2}\right)^{1/3} - \text{R} \)
B \( \left(\frac{\text{GMT}^{2}}{4\pi^2}\right)^{1/3} - \text{R} \)
C C. \( \left(\frac{\text{GMT}^{-2}}{4\pi^2}\right)^{1/1} - \text{R} \)
D \( \left(\frac{\text{GMT}^{-2}}{4\pi^2}\right)^{1/3} - \text{R} \)