GKFix MCQ Question

What is the formula used to calculate the mass of Mars from Phobos’ orbit?

• A. $ M_m = \frac{G T^2}{4\pi^2 R^3} $
• B. $ M_m = \frac{4\pi^2 R^2}{G T} $
• C. $ M_m = \frac{4\pi^2 R^3}{G T^2} $
• D. $ M_m = \frac{G R^3}{4\pi^2 T^2} $