8. As shown, a charge particle q is inject into a space with uniform electric field E = E₀ x, where E₀ is the absolute value of the electric field and x is the unit vector along the x-axis. The initial velocity of the particle is v = v₀y, where y is the unit vector along the y-axis. A magnetic field B is applied into the same space to maintain the velocity of the particle. Which one of the following fields is the correct one? (A) B =(B) B = (C) B =(D) B =(E) B =