A beam of unpolarized light passes through a linear polarizing filter whose transmission axis is oriented at an angle of \(45^\circ\) relative to the vertical. The transmitted beam then strikes the flat, horizontal top surface of a glass block at the polarizing angle \(\theta_p\), such that the plane of incidence is vertical. Which of the following diagrams best represents the orientation of the electric field oscillations for the reflected beam as viewed looking directly along its direction of propagation?