Explanation: In waveguides, especially for the dominant TE10 mode, the electric field is strongest at the center and must be zero at the conductive walls. The magnetic field, being intricately linked to and orthogonal to the electric field, exhibits the opposite behavior. Therefore, the magnetic field is strongest at the edges of the waveguide, near the conductive walls, where it induces currents critical for wave propagation. Option A is incorrect because waveguides guide electromagnetic waves through internal reflections off their conductive surfaces, not by conduction via the polarization of fields. Polarization describes the orientation of the electric field, not the propagation mechanism. Option B is incorrect as "ancillary deflection" is not a principle associated with waveguide operation. Option C is incorrect because, as explained, the magnetic field is strongest at the edges, not the center, which is where the electric field is typically strongest for the dominant mode.