Basically, just click the one you like better of whoever two members are presented, or one of the other two options (the top one if you're having a hard time choosing one because you like them *almost* equally, or the bottom if you are not aware of/don't care at all about both of them) until you get through all of them, then your bias list will be displayed. If you don't know either of the members presented, you might want to select the "No Opinion" option.