[单选题]
In all three types of radioactive decay, what value is conse h*;b8g.zs ayrrved in addit.zvn v2 8;qu2jdlc9uo ion to electric charge, energy92 v2zjvqdln c8uo;u. , and momentum?
A. atomic number
B. neutron number
C. nucleon number
D. none of the given answers