If the Magnetic Field in a Plane Electromagnetic Wave Is $\omega$

Multiple Choice

If the magnetic field in a plane electromagnetic wave is along the y axis and its component is given by B_m sin (kx - $\omega$ t) , in SI units them the electric field is along the z axis its component is given by"

A) (cB_m) cos(kx - $\omega$ t)
B) -(cB_m/c) cos(kx - $\omega$ t)
C) -(cB_m/c) ) sin(kx - $\omega$ t)
D) B_mcos(kx - $\omega$ t)
E) (cB_m/c) ) sin(kx - $\omega$ t)