A Potential of 12 V Is Applied Across a Parallel-Plate $\kappa$

Multiple Choice

A potential of 12 V is applied across a parallel-plate capacitor which is constructed of square plates of side 10 cm and separation of 4.0 mm.A dielectric slab of constant $\kappa$ = 2.5 is inserted between the plates so that it completely fills the space.What is the bound surface charge density on the dielectric?

A) 12.3 pC/m²
B) 15.9 pC/m²
C) 39.8 pC/m²
D) 56.8 pC/m²
E) 85.4 pC/m²