What Was the Proposition of the Study of Latané (1981)

What was the proposition of the study of Latané (1981) for additional members to a group subject to the law of diminishing returns?

A) Influence of confederates decreases for a large group size.
B) Conformity increases with group size irrespective of the number of confederates.
C) The strength of minority decreases with the number of additions to the group.
D) Conformity decreases with the addition of confederates.