If Pascal $$\text{Pa}$$, the unit of pressure, volt $$\text{V}$$, the unit of potential, and meter represented by $$L$$, the unit of length, are taken as fundamental units, the dimensional formula for the permittivity $$\varepsilon_0$$ of free space is expressed as

A

$$\text{Pa}^{-1}\text{V}^{2}L^{-2}$$

B

$$\text{Pa}\,\text{V}^{-2}L^{2}$$

C

$$\text{Pa}\,\text{V}^{2}L^{-2}$$

D

$$\text{Pa}^{-1}\text{V}^{-2}L^{2}$$