${ }_{27}^{60} \mathrm{Co}$ Has an Atomic Mass Of $59.933819 \mathrm{u}$ , And

Multiple Choice

${ }_{27}^{60} \mathrm{Co}$ has an atomic mass of $59.933819 \mathrm{u}$ , and ${ }_{28}^{60} \mathrm{Ni}$ has an atomic mass of $59.930788 \mathrm{u}$ . Which is the correct decay process (or the likeliest if more than one is ${ }^{28}$ possible) ?

A) ${ }^{60} \mathrm{Ni} \rightarrow{ }^{60} \mathrm{Co}+v$
B) ${ }^{60} \mathrm{Ni} \rightarrow{ }^{60} \mathrm{Co}+e^{-}+\bar{v}$
C) ${ }^{60} \mathrm{Ni} \rightarrow{ }^{60} \mathrm{Co}+e^{+}+v$
D) ${ }^{60} \mathrm{Co} \rightarrow{ }^{60} \mathrm{Ni}+\boldsymbol{e}^{-}+\bar{v}$
E) ${ }^{60} \mathrm{Co} \rightarrow{ }^{60} \mathrm{Ni}+e^{+}+v$