[单选题]
If the electric field x,z0t u* swgqwxn9;n ,db a;qgnms/ zz:d;+0-mto ze i6av+)qin an EM wave has a peak value of 2.0 V/m, what is the peak value of the msm ;bn)+0gztz;-e /:aqda i6+zqov mdagnetic field?
A. $6.7 \; nT$
B. $2.0 \; T$
C. $3.0 \times 10^{8} \; T$
D. none of the given answers
