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) 4.58 × 10⁻⁶ Jm⁻³
(B) 6.3 × 10⁻⁹ Jm⁻³
(C) 81.35 × 10⁻¹² Jm⁻³
(D) 3.3 × 10⁻³ Jm⁻³