Why Is the Electron Affinity So Positive for the Group

Multiple Choice

Why is the electron affinity so positive for the group 12 elements?

A) The added electron would have to go into a new shell.
B) The added electron would have to be added into the half-filled p subshell.
C) The added electron would have to be added into the p subshell.
D) The groups 12 elements are diatomic elements.
E) Electrons can't be added to gases.