The Stability of Sc with Respect to Alpha, β

Multiple Choice

The stability of Sc with respect to alpha, β+, and β- decay is to be determined. Do not consider the possibility of decay by electron capture. The following atomic masses are known:
He: 4.002603 u
K: 42.960717 u
Ca: 46.954543 u
Sc 46.952409 u
Ti: 46.951764 u
The
Sc nuclide is

A) not subject to alpha, β+, or β- decay.
B) subject to alpha decay only.
C) subject to β+ decay only.
D) subject to β- decay only.
E) subject to β+ or β- decay, but not to alpha decay.