The rms value of the electric field of the light coming from the Sun is $$720\,N/C$$. The average total energy density of the electromagnetic wave is

A

$$3.3 \times 10^{-3}\,J/m^3$$

B

$$4.58 \times 10^{-6}\,J/m^3$$

C

$$6.37 \times 10^{-9}\,J/m^3$$

D

$$81.35 \times 10^{-12}\,J/m^3$$