A parallel plate capacitor is connected to a battery of constant emf. Let the electric field at a given point between the plate be `E_(0)`, when there is no medium between the plates. The new electric field at the point, If a medium of dielectric constant A is intoduced between them, is
A. `(E_(0))/(4)`
B. `(E_(0))/(2)`
C. `E_(0)`
D. `4E_(0)`
