[单选题]
In all three types of radioaced9:5rc+l:c 2sg .fhgyqmo1 (ejy4n*vqg6dv tive decay, what value is conserved in addition tfsi:dyiphi2 ) :kpn kn/)6 h 3(ht7ywpo electr3 )ikh/ ins 2h( kypp:wph:y6ti7)fdnic charge, energy, and momentum?
A. atomic number
B. neutron number
C. nucleon number
D. none of the given answers
