Please answer the question. NOTE: an answer option is missing, this being that the option is known to be incorrect.

4. The magnetic field of a traveling EM wave is given by the expression below, with Bo, C1 and C2 all positive. Which of the following statements are true? B(y, t) = Bocos(C1 y - Cz t) x The wave is propagating in the positive x direction II. The wave is propagating in the negative x direction When y=t=0, the magnetic field points in the +x direction IV. When y=t=0, the electric field points in the +z direction V. The wave is polarized along the z axis A. I, III, and V B. II, Ill, and V C. III, IV, and V D. I, III, and IV