[单选题]
17.16: Which one of zc3 p bu7t94rn meb ds/4r8ny+t k)zy,a0j sm3 ez-q0z2mfno5the following choices best represents the type of electromagnetic wave as)ytz m20qj z 3sem-onkfaz, 05sociated with a frequency of $10^{18}Hz$?
A. AM radio
B. microwaves
C. ultraviolet light
D. is X rays
E. red light