电场强度矢量的亥姆霍兹方程的复数形式为()A. nabla^2 E - omega^2 mu varepsilon E = 0B. nabla^2 E + omega mu varepsilon E = 0C. nabla^2 E + omega^2 mu varepsilon E = 0D. nabla^2 E - mu varepsilon (partial^2 E)/(partial t^2) = 0

A. $\nabla^2 E - \omega^2 \mu \varepsilon E = 0$

B. $\nabla^2 E + \omega \mu \varepsilon E = 0$

C. $\nabla^2 E + \omega^2 \mu \varepsilon E = 0$

D. $\nabla^2 E - \mu \varepsilon \frac{\partial^2 E}{\partial t^2} = 0$