[单选题]
If an atom's atomic number is given by.u0*qqq z qpg 42.ekw2ovlylk. ,bd+hatl0paj3+q9s:tgyf s b32ng ) Z, its atomic mass by A, and its neutron number by N, wasn2tpl f)j+g b:3yg0 s aqt39hich of the following is correct?
A. N = A + Z
B. N = Z - A
C. N = A - Z
D. none of the given answers