[单选题]
One reason a photon coult*d.n1e3z b/5mue d1bn(k hcodim *+p d not create an odd numbc9sbeui6./ oxer of electrons and positrons is that such a oxb/u6 9es.ci process would
A. not conserve charge.
B. not conserve energy.
C. require photon energies that are not attainable.
D. result in the creation of mass.
