Answer:
I believe this is a "true" or "false" statement.
False
Explanation:
"Secondary group" is a type of social group where relationship of members are impersonal and temporary. Their relationship is also directed to a common goal. Contrary to this is the "Primary group." The Primary group is a type of social group where relationship of members are close, such as personal and close relationship of friends.
"Informal social control" is being exercised in a society through the established social order. This means that, it is not being exercised by laws or rules. This is an effective control for "primary groups" or small groups.
So, this means that it is not operative within the secondary groups only but within the primary groups only (family, friends, neigborhood, etc.) Using it in secondary groups will render the control useless because the large groups will just ignore it.
So, this explains the answer.