[单选题]
When a proton passes thro;q0j *owanr tu38 z6a v)ttc.zugh matter, it is possible for it to intefjyzls-+g 4wnnep: 7 (ract with the matter in such a way that an electron ann4 +j:l ey(-fpgs7nwzd a positron are produced; this interaction is referred to as
A. the photoelectric effect.
B. the Compton effect.
C. pair production.
D. none of the given answers