Concept:A consumer co-operative society is owned and controlled by its own members.
Explanation:In a consumer co-operative, the people who purchase and use the goods are also the people who own the business.
This ownership means that members contribute capital, share profits, and take part in democratic decision-making.
Option B states that members are the owners, which is the central distinguishing feature.
The other options do not describe a consumer co-operative: maximum or minimum numbers apply to different business types, and members being workers applies to a producer co-operative.
Answer:B. members are the owners.