If we measure Lz for a particle in a state with the orbital angular momentum quantum number l = 2, what are the possible outcomes of the measurement?
a) -2ħ, -ħ, 0, ħ, 2ħ
b) -3ħ, -2ħ, -ħ, 0, ħ, 2ħ, 3ħ
c) -ħ, 0, ħ
d) -2ħ, 0, 2ħ