The Electron Spin Quantum Number Can Have Values of $- 1 / 2 , + 1 / 2$

Multiple Choice

The electron spin quantum number can have values of

A) $- 1 / 2 , + 1 / 2$ .
B) only $+ 1 / 2$ .
C) $- 1 / 2 , - 1 , + 1 , + 1 / 2$ .
D) $- 1 / 2 , - 1,0 , + 1 , + 1 / 2$ .
E) $- 1 / 2,0 , + 1 / 2$ .