48. The spin functions α and β cannot be expressed in terms of spherical harmonics, but they can be expressed as column matrices: The spin operator can be represented by the following Pauli matrix: Ŝzα = cα and Ŝzβ = dβ. (c, d) = ? (A) (1/2, 1/2) (B) (1/2, -1/2) (C) (-1/2, 1/2) (D) (-1/2, -1/2) (E) (1, 1)