The black codes were enacted as a means to: multiple choice

ban all discrimination on the basis of race.
ban discrimination on the basis of race, gender and religion.
extend discrimination laws to u. s. citizens working for american companies outside of the u. s.

Recall that in one condition of the experiment conducted by stasser and titus (1985) about student council president candidates, all group members had access to the same information, and that in another condition, members had unique information that other group members didn't know. in the second (unshared information) condition, the group made a worse decision than in the first (shared information) condition. this occurred because groups seldom can agree on who is most expert. focus discussion on the information that all members know. often ignore dissenting opinions. avoid differences of opinion, given conformity pressures.