FIGURE 31-1 -An Electromagnetic Wave Propagates Along the +Y Direction as Shown

FIGURE 31-1
-An electromagnetic wave propagates along the +y direction as shown in Fig. 31-1. If the E-field at the origin is along the +z direction, what is the direction of the B-field?

A) +z
B) -z
C) +y
D) +x
E) -x