[单选题]
One reason a photon could not create an odd number of-a7 vmqvdc1 0xuek g2awo *7h4 electjga 1+0onsp2y* w jky-rons and positrons is that sucj k2+1w*p0oa y nyjg-sh a 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.
Post time 2024-1-22 02:15:01