The dimensional formula of capacitance is . . . . . . . Take $Q$ as the dimensional formula of charge.

• A
  $M^1 L^{-2} T^{-2} Q^{-2}$
• B
  $M^1 L^2 T^{-2} Q^{-2}$
• C
  $M^1 L^{-2} T^2 Q^2$
• D
  $M^{-1} L^{-2} T^2 Q^2$