Two large parallel conducting plates are placed close to each other ,the inner surface of the two plates have surface charge densities `+sigma` and `-sigma` .The outer surfaces are without charge.The electric field has a magnitude of
A. `(sigma)/(epsilon_(0))` in the region between the plates
B. `(sigma)/(epsilon_(0))` in the region outside the plates.
C. `(2sigma)/(epsilon_(0))` in the region between the plates
D. zero in the region outside the plates.