Group norms are
a.
general, informal standards that determine consequences for breaking rules
b.
general, informal standards for appropriate group behavior
c.
general, formalized standards for appropriate group behavior
d.
general, formalized standards that determine consequences for breaking rules

Group norms are general, informal standards for determining group behavior. Group norms are often unspoken and are determined by the relationship between individuals that constitute the group over a period of time that may very in length and by group number which may vary in size. Group norms have a strong effect on social interactions and an ability to perceive these norms often leads to better interactive outcomes.